./Ultimate.py --spec ../../../trunk/examples/svcomp/properties/unreach-call.prp --file ../../../trunk/examples/svcomp/pthread-wmm/safe003_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/safe003_tso.yml/witness.yml --architecture 32bit -------------------------------------------------------------------------------- Checking for ERROR reachability Using default analysis Version cde23df1 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/safe003_tso.i ./goblint.2024-05-21_14-57-05.files/mutex-meet/safe003_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-cde23df-m [2024-06-14 13:51:47,234 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-14 13:51:47,323 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-14 13:51:47,328 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-14 13:51:47,329 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-14 13:51:47,366 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-14 13:51:47,367 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-14 13:51:47,368 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-14 13:51:47,368 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-14 13:51:47,372 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-14 13:51:47,372 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-14 13:51:47,373 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-14 13:51:47,374 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-14 13:51:47,375 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-14 13:51:47,375 INFO L153 SettingsManager]: * Use SBE=true [2024-06-14 13:51:47,376 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-14 13:51:47,376 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-14 13:51:47,376 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-14 13:51:47,377 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-14 13:51:47,377 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-14 13:51:47,377 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-14 13:51:47,378 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-14 13:51:47,378 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-14 13:51:47,378 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-14 13:51:47,378 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-14 13:51:47,379 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-14 13:51:47,379 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-14 13:51:47,379 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-14 13:51:47,380 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-14 13:51:47,380 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-14 13:51:47,381 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-14 13:51:47,381 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-14 13:51:47,382 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:51:47,382 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-14 13:51:47,382 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-14 13:51:47,382 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-14 13:51:47,383 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-14 13:51:47,383 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-14 13:51:47,383 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-14 13:51:47,383 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-14 13:51:47,384 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-14 13:51:47,384 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-14 13:51:47,384 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-14 13:51:47,384 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$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-14 13:51:47,690 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-14 13:51:47,714 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-14 13:51:47,717 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-14 13:51:47,718 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-14 13:51:47,719 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-14 13:51:47,720 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/./goblint.2024-05-21_14-57-05.files/mutex-meet/safe003_tso.yml/witness.yml [2024-06-14 13:51:47,872 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-14 13:51:47,872 INFO L274 PluginConnector]: CDTParser initialized [2024-06-14 13:51:47,873 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_tso.i [2024-06-14 13:51:49,029 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-14 13:51:49,284 INFO L384 CDTParser]: Found 1 translation units. [2024-06-14 13:51:49,285 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_tso.i [2024-06-14 13:51:49,302 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/780f2ac5b/0a416b955531409782e3538727ad3f1c/FLAG4a5758ec1 [2024-06-14 13:51:49,321 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/780f2ac5b/0a416b955531409782e3538727ad3f1c [2024-06-14 13:51:49,324 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-14 13:51:49,325 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-14 13:51:49,328 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-14 13:51:49,328 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-14 13:51:49,333 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-14 13:51:49,334 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:51:47" (1/2) ... [2024-06-14 13:51:49,335 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2945fee3 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:49, skipping insertion in model container [2024-06-14 13:51:49,335 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:51:47" (1/2) ... [2024-06-14 13:51:49,337 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@b9d5f52 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 14.06 01:51:49, skipping insertion in model container [2024-06-14 13:51:49,338 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:51:49" (2/2) ... [2024-06-14 13:51:49,338 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@2945fee3 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:49, skipping insertion in model container [2024-06-14 13:51:49,339 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 14.06 01:51:49" (2/2) ... [2024-06-14 13:51:49,339 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-14 13:51:49,394 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-14 13:51:49,396 INFO L97 edCorrectnessWitness]: Location invariant before [L781-L781] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (3LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (3LL - (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 13:51:49,396 INFO L97 edCorrectnessWitness]: Location invariant before [L784-L784] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_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) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (3LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (3LL - (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 13:51:49,397 INFO L97 edCorrectnessWitness]: Location invariant before [L783-L783] (((((((! multithreaded || 0 <= __unbuffered_cnt) && (! multithreaded || (((0 <= __unbuffered_p2_EAX && __unbuffered_p2_EAX <= 2) && __unbuffered_p2_EAX <= 127) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)))) && (! multithreaded || ((0 <= __unbuffered_p1_EAX && __unbuffered_p1_EAX <= 1) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)))) && (! multithreaded || (((0 <= __unbuffered_p2_EBX && __unbuffered_p2_EBX <= 2) && __unbuffered_p2_EBX <= 127) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)))) && (! multithreaded || (((0 <= y && y <= 2) && y <= 127) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((((((((((((((((((((((((((((((((((((((((((0LL - (long long )__unbuffered_p1_EAX) + (long long )x >= 0LL && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EAX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )__unbuffered_p2_EBX >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )main$tmp_guard1 >= 0LL) && (1LL - (long long )__unbuffered_p1_EAX) + (long long )y >= 0LL) && (1LL - (long long )x) + (long long )y >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p1_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_cnt + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_cnt + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_cnt + (long long )x >= 0LL) && (long long )__unbuffered_cnt + (long long )y >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EAX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )main$tmp_guard1 >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )x >= 0LL) && (long long )__unbuffered_p1_EAX + (long long )y >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )__unbuffered_p2_EBX >= 0LL) && (long long )__unbuffered_p2_EAX + (long long )main$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$tmp_guard1 + (long long )y >= 0LL) && (long long )x + (long long )y >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )__unbuffered_p1_EAX >= 0LL) && (1LL + (long long )__unbuffered_cnt) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EAX) - (long long )x >= 0LL) && (1LL + (long long )__unbuffered_p2_EBX) - (long long )x >= 0LL) && (1LL + (long long )main$tmp_guard1) - (long long )x >= 0LL) && (2LL + (long long )__unbuffered_cnt) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EAX) - (long long )y >= 0LL) && (2LL + (long long )__unbuffered_p2_EBX) - (long long )y >= 0LL) && (2LL + (long long )main$tmp_guard1) - (long long )y >= 0LL) && (2LL + (long long )x) - (long long )y >= 0LL) && (2LL - (long long )__unbuffered_p1_EAX) - (long long )x >= 0LL) && (3LL - (long long )__unbuffered_p1_EAX) - (long long )y >= 0LL) && (3LL - (long long )x) - (long long )y >= 0LL))) && (! multithreaded || ((((((((((((((((0 <= __unbuffered_cnt && 0 <= __unbuffered_p1_EAX) && 0 <= __unbuffered_p2_EAX) && 0 <= __unbuffered_p2_EBX) && 0 <= x) && 0 <= y) && __unbuffered_p1_EAX <= 1) && __unbuffered_p2_EAX <= 127) && __unbuffered_p2_EBX <= 127) && x <= 1) && y <= 2) && y <= 127) && (__unbuffered_p1_EAX == 0 || __unbuffered_p1_EAX == 1)) && (x == 0 || x == 1)) && ((__unbuffered_p2_EAX == 0 || __unbuffered_p2_EAX == 1) || __unbuffered_p2_EAX == 2)) && ((__unbuffered_p2_EBX == 0 || __unbuffered_p2_EBX == 1) || __unbuffered_p2_EBX == 2)) && ((y == 0 || y == 1) || y == 2)))) && (! multithreaded || ((0 <= x && x <= 1) && (x == 0 || x == 1))) [2024-06-14 13:51:49,397 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-14 13:51:49,397 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-14 13:51:49,445 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-14 13:51:49,771 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:51:49,785 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-14 13:51:49,988 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-14 13:51:50,023 INFO L206 MainTranslator]: Completed translation [2024-06-14 13:51:50,026 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:50 WrapperNode [2024-06-14 13:51:50,026 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-14 13:51:50,027 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-14 13:51:50,027 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-14 13:51:50,027 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-14 13:51:50,034 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,057 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,102 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-14 13:51:50,102 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-14 13:51:50,103 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-14 13:51:50,103 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-14 13:51:50,103 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-14 13:51:50,114 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,115 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,118 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,144 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]. [2024-06-14 13:51:50,146 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,146 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,167 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,169 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,171 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,173 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,189 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-14 13:51:50,190 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-14 13:51:50,190 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-14 13:51:50,190 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-14 13:51:50,191 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:50" (1/1) ... [2024-06-14 13:51:50,208 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-14 13:51:50,215 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-14 13:51:50,278 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) [2024-06-14 13:51:50,301 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 [2024-06-14 13:51:50,322 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-14 13:51:50,322 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-14 13:51:50,322 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-14 13:51:50,322 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-14 13:51:50,323 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-14 13:51:50,323 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-14 13:51:50,323 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-14 13:51:50,323 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-14 13:51:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-14 13:51:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-14 13:51:50,324 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-14 13:51:50,324 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-14 13:51:50,326 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-14 13:51:50,465 INFO L244 CfgBuilder]: Building ICFG [2024-06-14 13:51:50,467 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-14 13:51:50,824 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-14 13:51:50,825 INFO L293 CfgBuilder]: Performing block encoding [2024-06-14 13:51:50,933 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-14 13:51:50,933 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-14 13:51:50,934 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:51:50 BoogieIcfgContainer [2024-06-14 13:51:50,934 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-14 13:51:50,938 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-14 13:51:50,938 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-14 13:51:50,941 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-14 13:51:50,941 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 14.06 01:51:47" (1/4) ... [2024-06-14 13:51:50,942 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b61f453 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 14.06 01:51:50, skipping insertion in model container [2024-06-14 13:51:50,942 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 14.06 01:51:49" (2/4) ... [2024-06-14 13:51:50,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b61f453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:51:50, skipping insertion in model container [2024-06-14 13:51:50,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 14.06 01:51:50" (3/4) ... [2024-06-14 13:51:50,943 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@b61f453 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 14.06 01:51:50, skipping insertion in model container [2024-06-14 13:51:50,943 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 14.06 01:51:50" (4/4) ... [2024-06-14 13:51:50,944 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_tso.i [2024-06-14 13:51:50,963 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-14 13:51:50,963 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-14 13:51:50,963 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-14 13:51:51,028 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-14 13:51:51,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:51:51,112 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-14 13:51:51,113 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:51:51,115 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48 conditions, 38 events. 0/38 cut-off events. For 0/0 co-relation queries the response was YES. Maximal size of possible extension queue 4. Compared 62 event pairs, 0 based on Foata normal form. 0/35 useless extension candidates. Maximal degree in co-relation 0. Up to 1 conditions per place. [2024-06-14 13:51:51,115 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-14 13:51:51,119 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-14 13:51:51,134 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-14 13:51:51,142 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;@44cd3228, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-14 13:51:51,143 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-14 13:51:51,147 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-14 13:51:51,148 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-14 13:51:51,148 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-14 13:51:51,148 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:51,149 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-14 13:51:51,150 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)] === [2024-06-14 13:51:51,155 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:51,156 INFO L85 PathProgramCache]: Analyzing trace with hash -1782945868, now seen corresponding path program 1 times [2024-06-14 13:51:51,168 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:51,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382746929] [2024-06-14 13:51:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:51,170 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:51,366 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:52,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:52,115 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:52,115 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382746929] [2024-06-14 13:51:52,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382746929] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:52,117 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:52,117 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-14 13:51:52,119 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1514694119] [2024-06-14 13:51:52,119 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:52,127 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-14 13:51:52,134 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:52,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-14 13:51:52,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-14 13:51:52,196 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-14 13:51:52,198 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 32 transitions, 73 flow. Second operand has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:52,199 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:52,199 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-14 13:51:52,209 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:52,461 INFO L124 PetriNetUnfolderBase]: 474/803 cut-off events. [2024-06-14 13:51:52,461 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-14 13:51:52,466 INFO L83 FinitePrefix]: Finished finitePrefix Result has 1614 conditions, 803 events. 474/803 cut-off events. For 23/23 co-relation queries the response was YES. Maximal size of possible extension queue 59. Compared 3929 event pairs, 295 based on Foata normal form. 1/766 useless extension candidates. Maximal degree in co-relation 1599. Up to 744 conditions per place. [2024-06-14 13:51:52,473 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 29 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-14 13:51:52,473 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 165 flow [2024-06-14 13:51:52,474 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-14 13:51:52,477 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-14 13:51:52,483 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-14 13:51:52,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-14 13:51:52,487 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 84 transitions. [2024-06-14 13:51:52,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 165 flow [2024-06-14 13:51:52,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-14 13:51:52,492 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-14 13:51:52,494 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=70, PETRI_DIFFERENCE_MINUEND_PLACES=39, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=32, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=1, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=3, PETRI_FLOW=100, PETRI_PLACES=42, PETRI_TRANSITIONS=35} [2024-06-14 13:51:52,497 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-14 13:51:52,498 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-14 13:51:52,498 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 3 states, 3 states have (on average 18.0) internal successors, (54), 3 states have internal predecessors, (54), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:52,498 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:52,498 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:52,499 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-14 13:51:52,499 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)] === [2024-06-14 13:51:52,499 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:52,500 INFO L85 PathProgramCache]: Analyzing trace with hash 280983315, now seen corresponding path program 1 times [2024-06-14 13:51:52,500 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:52,500 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1205587312] [2024-06-14 13:51:52,500 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:52,500 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:52,512 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:52,834 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:52,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:52,836 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1205587312] [2024-06-14 13:51:52,836 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1205587312] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:52,836 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:52,836 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-14 13:51:52,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220185055] [2024-06-14 13:51:52,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:52,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-14 13:51:52,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:52,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-14 13:51:52,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-14 13:51:52,880 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:51:52,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 42 places, 35 transitions, 100 flow. Second operand has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:52,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:52,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:51:52,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:53,108 INFO L124 PetriNetUnfolderBase]: 742/1215 cut-off events. [2024-06-14 13:51:53,108 INFO L125 PetriNetUnfolderBase]: For 234/237 co-relation queries the response was YES. [2024-06-14 13:51:53,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 2781 conditions, 1215 events. 742/1215 cut-off events. For 234/237 co-relation queries the response was YES. Maximal size of possible extension queue 74. Compared 5944 event pairs, 380 based on Foata normal form. 7/1216 useless extension candidates. Maximal degree in co-relation 2766. Up to 1086 conditions per place. [2024-06-14 13:51:53,123 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 44 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-06-14 13:51:53,123 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 282 flow [2024-06-14 13:51:53,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:51:53,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:51:53,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-14 13:51:53,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2024-06-14 13:51:53,131 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 109 transitions. [2024-06-14 13:51:53,131 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 282 flow [2024-06-14 13:51:53,133 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-14 13:51:53,135 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 171 flow [2024-06-14 13:51:53,135 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=96, PETRI_DIFFERENCE_MINUEND_PLACES=41, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=35, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=4, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=28, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=171, PETRI_PLACES=46, PETRI_TRANSITIONS=44} [2024-06-14 13:51:53,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-14 13:51:53,136 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 171 flow [2024-06-14 13:51:53,136 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 4 states, 4 states have (on average 15.75) internal successors, (63), 4 states have internal predecessors, (63), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:53,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:53,138 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:53,140 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-14 13:51:53,140 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)] === [2024-06-14 13:51:53,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:53,141 INFO L85 PathProgramCache]: Analyzing trace with hash 120548589, now seen corresponding path program 1 times [2024-06-14 13:51:53,142 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:53,147 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1570117936] [2024-06-14 13:51:53,147 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:53,147 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:53,161 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:53,506 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:53,507 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:53,507 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1570117936] [2024-06-14 13:51:53,507 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1570117936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:53,507 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:53,507 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:51:53,508 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441877855] [2024-06-14 13:51:53,508 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:53,508 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:51:53,509 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:53,509 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:51:53,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:51:53,560 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:53,561 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 46 places, 44 transitions, 171 flow. Second operand has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:53,562 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:53,562 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:53,562 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:53,821 INFO L124 PetriNetUnfolderBase]: 926/1521 cut-off events. [2024-06-14 13:51:53,822 INFO L125 PetriNetUnfolderBase]: For 1002/1002 co-relation queries the response was YES. [2024-06-14 13:51:53,826 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4071 conditions, 1521 events. 926/1521 cut-off events. For 1002/1002 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7409 event pairs, 372 based on Foata normal form. 3/1523 useless extension candidates. Maximal degree in co-relation 4053. Up to 1374 conditions per place. [2024-06-14 13:51:53,837 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 58 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-06-14 13:51:53,838 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 74 transitions, 396 flow [2024-06-14 13:51:53,838 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:51:53,838 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:51:53,841 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 13:51:53,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-14 13:51:53,843 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 171 flow. Second operand 5 states and 124 transitions. [2024-06-14 13:51:53,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 74 transitions, 396 flow [2024-06-14 13:51:53,846 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 394 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 13:51:53,848 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 256 flow [2024-06-14 13:51:53,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=169, PETRI_DIFFERENCE_MINUEND_PLACES=46, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=44, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=2, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=36, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=256, PETRI_PLACES=53, PETRI_TRANSITIONS=53} [2024-06-14 13:51:53,849 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-14 13:51:53,850 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 256 flow [2024-06-14 13:51:53,850 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 14.6) internal successors, (73), 5 states have internal predecessors, (73), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:53,850 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:53,850 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:53,850 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-14 13:51:53,852 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:53,852 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:53,853 INFO L85 PathProgramCache]: Analyzing trace with hash -1838225564, now seen corresponding path program 1 times [2024-06-14 13:51:53,853 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:53,853 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [672257717] [2024-06-14 13:51:53,853 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:53,854 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:53,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:54,309 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:54,311 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:54,314 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [672257717] [2024-06-14 13:51:54,314 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [672257717] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:54,315 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:54,315 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:54,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195559445] [2024-06-14 13:51:54,320 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:54,320 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:54,321 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:54,322 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:54,322 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:54,380 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:54,381 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 53 places, 53 transitions, 256 flow. Second operand has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:54,381 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:54,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:54,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:54,694 INFO L124 PetriNetUnfolderBase]: 917/1504 cut-off events. [2024-06-14 13:51:54,695 INFO L125 PetriNetUnfolderBase]: For 1558/1558 co-relation queries the response was YES. [2024-06-14 13:51:54,698 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4485 conditions, 1504 events. 917/1504 cut-off events. For 1558/1558 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7321 event pairs, 251 based on Foata normal form. 6/1509 useless extension candidates. Maximal degree in co-relation 4462. Up to 1329 conditions per place. [2024-06-14 13:51:54,706 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2024-06-14 13:51:54,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 472 flow [2024-06-14 13:51:54,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:54,708 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:54,708 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 13:51:54,709 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 13:51:54,709 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 256 flow. Second operand 6 states and 143 transitions. [2024-06-14 13:51:54,709 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 472 flow [2024-06-14 13:51:54,712 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 470 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-14 13:51:54,714 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 291 flow [2024-06-14 13:51:54,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=246, PETRI_DIFFERENCE_MINUEND_PLACES=52, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=52, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=10, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=40, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=291, PETRI_PLACES=58, PETRI_TRANSITIONS=54} [2024-06-14 13:51:54,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-14 13:51:54,715 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 291 flow [2024-06-14 13:51:54,715 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 14.5) internal successors, (87), 6 states have internal predecessors, (87), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:54,715 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:54,715 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:54,715 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-14 13:51:54,716 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:51:54,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:54,716 INFO L85 PathProgramCache]: Analyzing trace with hash 1910852492, now seen corresponding path program 1 times [2024-06-14 13:51:54,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:54,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1686446342] [2024-06-14 13:51:54,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:54,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:54,732 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:55,301 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:55,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:55,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1686446342] [2024-06-14 13:51:55,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1686446342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:55,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:55,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:51:55,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [963019083] [2024-06-14 13:51:55,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:55,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:51:55,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:55,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:51:55,304 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:51:55,337 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:55,338 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 58 places, 54 transitions, 291 flow. Second operand has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:55,338 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:55,338 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:55,338 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:55,597 INFO L124 PetriNetUnfolderBase]: 904/1471 cut-off events. [2024-06-14 13:51:55,597 INFO L125 PetriNetUnfolderBase]: For 2290/2301 co-relation queries the response was YES. [2024-06-14 13:51:55,602 INFO L83 FinitePrefix]: Finished finitePrefix Result has 4692 conditions, 1471 events. 904/1471 cut-off events. For 2290/2301 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7147 event pairs, 348 based on Foata normal form. 12/1478 useless extension candidates. Maximal degree in co-relation 4666. Up to 1305 conditions per place. [2024-06-14 13:51:55,610 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 14 changer transitions 0/67 dead transitions. [2024-06-14 13:51:55,610 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 452 flow [2024-06-14 13:51:55,610 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:51:55,611 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:51:55,611 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-14 13:51:55,611 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:51:55,611 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 291 flow. Second operand 4 states and 100 transitions. [2024-06-14 13:51:55,612 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 452 flow [2024-06-14 13:51:55,615 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 425 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-14 13:51:55,616 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 326 flow [2024-06-14 13:51:55,616 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=264, PETRI_DIFFERENCE_MINUEND_PLACES=54, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=54, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=326, PETRI_PLACES=59, PETRI_TRANSITIONS=56} [2024-06-14 13:51:55,617 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-14 13:51:55,617 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 326 flow [2024-06-14 13:51:55,618 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 15.2) internal successors, (76), 5 states have internal predecessors, (76), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:55,618 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:55,618 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:55,618 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-14 13:51:55,618 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)] === [2024-06-14 13:51:55,619 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:55,619 INFO L85 PathProgramCache]: Analyzing trace with hash 2078014321, now seen corresponding path program 1 times [2024-06-14 13:51:55,619 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:55,619 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [94326009] [2024-06-14 13:51:55,619 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:55,620 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:55,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:56,101 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:56,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:56,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [94326009] [2024-06-14 13:51:56,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [94326009] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:56,102 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:56,102 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:56,102 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1583111832] [2024-06-14 13:51:56,102 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:56,102 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:56,103 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:56,103 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:56,103 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:56,151 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:56,151 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 59 places, 56 transitions, 326 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:56,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:56,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:56,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:56,404 INFO L124 PetriNetUnfolderBase]: 931/1525 cut-off events. [2024-06-14 13:51:56,405 INFO L125 PetriNetUnfolderBase]: For 2825/2825 co-relation queries the response was YES. [2024-06-14 13:51:56,409 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5042 conditions, 1525 events. 931/1525 cut-off events. For 2825/2825 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7445 event pairs, 315 based on Foata normal form. 2/1519 useless extension candidates. Maximal degree in co-relation 5014. Up to 1275 conditions per place. [2024-06-14 13:51:56,417 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 27 changer transitions 0/95 dead transitions. [2024-06-14 13:51:56,418 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 672 flow [2024-06-14 13:51:56,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:56,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:56,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 13:51:56,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-14 13:51:56,419 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 326 flow. Second operand 6 states and 154 transitions. [2024-06-14 13:51:56,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 672 flow [2024-06-14 13:51:56,424 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 657 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-14 13:51:56,426 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 437 flow [2024-06-14 13:51:56,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=311, PETRI_DIFFERENCE_MINUEND_PLACES=58, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=56, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=35, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=437, PETRI_PLACES=64, PETRI_TRANSITIONS=66} [2024-06-14 13:51:56,427 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-14 13:51:56,427 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 437 flow [2024-06-14 13:51:56,427 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:56,427 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:56,428 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:56,428 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-14 13:51:56,428 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)] === [2024-06-14 13:51:56,428 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:56,428 INFO L85 PathProgramCache]: Analyzing trace with hash -1067490523, now seen corresponding path program 2 times [2024-06-14 13:51:56,429 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:56,429 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1976448286] [2024-06-14 13:51:56,429 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:56,429 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:56,441 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:56,958 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:56,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:56,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1976448286] [2024-06-14 13:51:56,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1976448286] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:56,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:56,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:56,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [329982418] [2024-06-14 13:51:56,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:56,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:56,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:56,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:56,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:57,001 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:57,002 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 64 places, 66 transitions, 437 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:57,002 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:57,002 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:57,002 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:57,330 INFO L124 PetriNetUnfolderBase]: 953/1566 cut-off events. [2024-06-14 13:51:57,331 INFO L125 PetriNetUnfolderBase]: For 4244/4244 co-relation queries the response was YES. [2024-06-14 13:51:57,337 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5701 conditions, 1566 events. 953/1566 cut-off events. For 4244/4244 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7727 event pairs, 314 based on Foata normal form. 2/1562 useless extension candidates. Maximal degree in co-relation 5671. Up to 1358 conditions per place. [2024-06-14 13:51:57,347 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 66 selfloop transitions, 22 changer transitions 0/94 dead transitions. [2024-06-14 13:51:57,348 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 94 transitions, 727 flow [2024-06-14 13:51:57,348 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:57,349 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:57,349 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 13:51:57,349 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:51:57,350 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 437 flow. Second operand 6 states and 144 transitions. [2024-06-14 13:51:57,350 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 94 transitions, 727 flow [2024-06-14 13:51:57,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 697 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-14 13:51:57,360 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 523 flow [2024-06-14 13:51:57,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=412, PETRI_DIFFERENCE_MINUEND_PLACES=63, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=66, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=16, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=47, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=523, PETRI_PLACES=69, PETRI_TRANSITIONS=72} [2024-06-14 13:51:57,361 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-14 13:51:57,362 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 523 flow [2024-06-14 13:51:57,362 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:57,362 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:57,362 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:57,362 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-14 13:51:57,363 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)] === [2024-06-14 13:51:57,363 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:57,363 INFO L85 PathProgramCache]: Analyzing trace with hash -313009423, now seen corresponding path program 3 times [2024-06-14 13:51:57,363 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:57,363 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1322259645] [2024-06-14 13:51:57,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:57,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:57,391 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:57,867 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:57,868 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:57,868 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1322259645] [2024-06-14 13:51:57,868 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1322259645] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:57,868 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:57,869 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:57,869 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1203616048] [2024-06-14 13:51:57,869 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:57,869 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:57,870 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:57,870 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:57,870 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:57,914 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:57,915 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 69 places, 72 transitions, 523 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:57,915 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:57,915 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:57,915 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:58,240 INFO L124 PetriNetUnfolderBase]: 959/1580 cut-off events. [2024-06-14 13:51:58,240 INFO L125 PetriNetUnfolderBase]: For 5340/5340 co-relation queries the response was YES. [2024-06-14 13:51:58,245 INFO L83 FinitePrefix]: Finished finitePrefix Result has 5944 conditions, 1580 events. 959/1580 cut-off events. For 5340/5340 co-relation queries the response was YES. Maximal size of possible extension queue 82. Compared 7796 event pairs, 314 based on Foata normal form. 4/1578 useless extension candidates. Maximal degree in co-relation 5911. Up to 1313 conditions per place. [2024-06-14 13:51:58,254 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 65 selfloop transitions, 31 changer transitions 0/102 dead transitions. [2024-06-14 13:51:58,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 102 transitions, 833 flow [2024-06-14 13:51:58,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:51:58,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:51:58,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 13:51:58,256 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-14 13:51:58,256 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 523 flow. Second operand 6 states and 151 transitions. [2024-06-14 13:51:58,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 102 transitions, 833 flow [2024-06-14 13:51:58,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 102 transitions, 775 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-14 13:51:58,268 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 578 flow [2024-06-14 13:51:58,268 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=465, PETRI_DIFFERENCE_MINUEND_PLACES=66, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=72, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=28, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=578, PETRI_PLACES=73, PETRI_TRANSITIONS=75} [2024-06-14 13:51:58,269 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-14 13:51:58,269 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 578 flow [2024-06-14 13:51:58,270 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:58,270 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:58,270 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:58,270 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-14 13:51:58,270 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)] === [2024-06-14 13:51:58,271 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:58,271 INFO L85 PathProgramCache]: Analyzing trace with hash -312763159, now seen corresponding path program 1 times [2024-06-14 13:51:58,271 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:58,271 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [463467909] [2024-06-14 13:51:58,271 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:58,271 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:58,283 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:58,746 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:58,747 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:58,747 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [463467909] [2024-06-14 13:51:58,747 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [463467909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:58,747 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:58,747 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:51:58,748 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [654552346] [2024-06-14 13:51:58,748 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:58,748 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:51:58,748 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:58,749 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:51:58,749 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:51:58,802 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:58,803 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 73 places, 75 transitions, 578 flow. Second operand has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:58,803 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:58,803 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:58,803 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:59,068 INFO L124 PetriNetUnfolderBase]: 968/1598 cut-off events. [2024-06-14 13:51:59,068 INFO L125 PetriNetUnfolderBase]: For 6843/6857 co-relation queries the response was YES. [2024-06-14 13:51:59,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6195 conditions, 1598 events. 968/1598 cut-off events. For 6843/6857 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7932 event pairs, 295 based on Foata normal form. 18/1610 useless extension candidates. Maximal degree in co-relation 6160. Up to 1355 conditions per place. [2024-06-14 13:51:59,088 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 68 selfloop transitions, 20 changer transitions 0/94 dead transitions. [2024-06-14 13:51:59,088 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 814 flow [2024-06-14 13:51:59,089 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:51:59,089 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:51:59,090 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-14 13:51:59,090 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-14 13:51:59,090 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 578 flow. Second operand 5 states and 121 transitions. [2024-06-14 13:51:59,090 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 814 flow [2024-06-14 13:51:59,101 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 750 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 13:51:59,105 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 588 flow [2024-06-14 13:51:59,106 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=514, PETRI_DIFFERENCE_MINUEND_PLACES=69, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=75, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=17, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=55, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=588, PETRI_PLACES=74, PETRI_TRANSITIONS=78} [2024-06-14 13:51:59,106 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-14 13:51:59,107 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 588 flow [2024-06-14 13:51:59,107 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.0) internal successors, (90), 6 states have internal predecessors, (90), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:59,107 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:59,107 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:59,107 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-14 13:51:59,108 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)] === [2024-06-14 13:51:59,108 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:59,108 INFO L85 PathProgramCache]: Analyzing trace with hash -6064227, now seen corresponding path program 1 times [2024-06-14 13:51:59,108 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:59,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [747378278] [2024-06-14 13:51:59,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:59,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:51:59,124 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:51:59,550 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:51:59,550 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:51:59,551 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [747378278] [2024-06-14 13:51:59,551 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [747378278] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:51:59,551 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:51:59,551 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:51:59,551 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1717432570] [2024-06-14 13:51:59,551 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:51:59,552 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:51:59,553 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:51:59,554 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:51:59,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:51:59,607 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:51:59,608 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 74 places, 78 transitions, 588 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:59,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:51:59,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:51:59,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:51:59,954 INFO L124 PetriNetUnfolderBase]: 963/1581 cut-off events. [2024-06-14 13:51:59,955 INFO L125 PetriNetUnfolderBase]: For 6420/6420 co-relation queries the response was YES. [2024-06-14 13:51:59,961 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6282 conditions, 1581 events. 963/1581 cut-off events. For 6420/6420 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7775 event pairs, 305 based on Foata normal form. 2/1577 useless extension candidates. Maximal degree in co-relation 6246. Up to 1303 conditions per place. [2024-06-14 13:51:59,975 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 70 selfloop transitions, 37 changer transitions 0/113 dead transitions. [2024-06-14 13:51:59,976 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 113 transitions, 922 flow [2024-06-14 13:51:59,976 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:51:59,977 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:51:59,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:51:59,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-14 13:51:59,978 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 588 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:51:59,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 113 transitions, 922 flow [2024-06-14 13:51:59,993 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 113 transitions, 872 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-14 13:51:59,995 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 620 flow [2024-06-14 13:51:59,995 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=538, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=37, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=41, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=620, PETRI_PLACES=79, PETRI_TRANSITIONS=78} [2024-06-14 13:51:59,995 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-14 13:51:59,996 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 620 flow [2024-06-14 13:51:59,996 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:51:59,996 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:51:59,996 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:51:59,996 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-14 13:51:59,997 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)] === [2024-06-14 13:51:59,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:51:59,997 INFO L85 PathProgramCache]: Analyzing trace with hash -492411141, now seen corresponding path program 2 times [2024-06-14 13:51:59,997 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:51:59,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1700500805] [2024-06-14 13:51:59,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:51:59,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:00,009 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:00,404 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:00,405 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:00,405 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1700500805] [2024-06-14 13:52:00,405 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1700500805] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:00,405 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:00,405 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:00,406 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1189856477] [2024-06-14 13:52:00,406 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:00,406 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:00,407 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:00,407 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:00,408 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:00,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:00,447 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 79 places, 78 transitions, 620 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:00,447 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:00,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:00,448 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:00,726 INFO L124 PetriNetUnfolderBase]: 974/1609 cut-off events. [2024-06-14 13:52:00,726 INFO L125 PetriNetUnfolderBase]: For 7869/7880 co-relation queries the response was YES. [2024-06-14 13:52:00,732 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6528 conditions, 1609 events. 974/1609 cut-off events. For 7869/7880 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 8010 event pairs, 324 based on Foata normal form. 10/1612 useless extension candidates. Maximal degree in co-relation 6491. Up to 1333 conditions per place. [2024-06-14 13:52:00,740 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 66 selfloop transitions, 29 changer transitions 0/101 dead transitions. [2024-06-14 13:52:00,740 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 101 transitions, 926 flow [2024-06-14 13:52:00,741 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:00,741 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:00,742 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 13:52:00,742 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-14 13:52:00,742 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 620 flow. Second operand 5 states and 126 transitions. [2024-06-14 13:52:00,743 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 101 transitions, 926 flow [2024-06-14 13:52:00,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 803 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:00,755 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 594 flow [2024-06-14 13:52:00,756 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=509, PETRI_DIFFERENCE_MINUEND_PLACES=71, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=78, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=52, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=594, PETRI_PLACES=76, PETRI_TRANSITIONS=81} [2024-06-14 13:52:00,756 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-14 13:52:00,756 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 594 flow [2024-06-14 13:52:00,757 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:00,757 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:00,757 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:00,757 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-14 13:52:00,757 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)] === [2024-06-14 13:52:00,758 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:00,758 INFO L85 PathProgramCache]: Analyzing trace with hash 742137513, now seen corresponding path program 3 times [2024-06-14 13:52:00,758 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:00,758 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2102403467] [2024-06-14 13:52:00,758 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:00,758 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:00,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:01,173 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:01,174 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:01,174 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2102403467] [2024-06-14 13:52:01,174 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2102403467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:01,174 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:01,175 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:01,175 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [362000285] [2024-06-14 13:52:01,175 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:01,175 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:01,176 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:01,176 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:01,177 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:01,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:01,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 76 places, 81 transitions, 594 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:01,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:01,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:01,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:01,568 INFO L124 PetriNetUnfolderBase]: 969/1599 cut-off events. [2024-06-14 13:52:01,568 INFO L125 PetriNetUnfolderBase]: For 8228/8231 co-relation queries the response was YES. [2024-06-14 13:52:01,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 6481 conditions, 1599 events. 969/1599 cut-off events. For 8228/8231 co-relation queries the response was YES. Maximal size of possible extension queue 81. Compared 7864 event pairs, 297 based on Foata normal form. 4/1601 useless extension candidates. Maximal degree in co-relation 6445. Up to 1328 conditions per place. [2024-06-14 13:52:01,581 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 73 selfloop transitions, 35 changer transitions 0/114 dead transitions. [2024-06-14 13:52:01,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 114 transitions, 894 flow [2024-06-14 13:52:01,582 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:01,582 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:01,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 13:52:01,583 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 13:52:01,584 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 594 flow. Second operand 8 states and 188 transitions. [2024-06-14 13:52:01,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 114 transitions, 894 flow [2024-06-14 13:52:01,600 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 846 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:01,601 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 624 flow [2024-06-14 13:52:01,602 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=546, PETRI_DIFFERENCE_MINUEND_PLACES=74, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=46, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=624, PETRI_PLACES=82, PETRI_TRANSITIONS=81} [2024-06-14 13:52:01,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-14 13:52:01,603 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 624 flow [2024-06-14 13:52:01,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:01,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:01,605 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:01,605 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-14 13:52:01,605 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)] === [2024-06-14 13:52:01,605 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:01,605 INFO L85 PathProgramCache]: Analyzing trace with hash 1796972016, now seen corresponding path program 1 times [2024-06-14 13:52:01,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:01,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1229339205] [2024-06-14 13:52:01,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:01,606 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:01,620 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:02,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:02,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:02,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1229339205] [2024-06-14 13:52:02,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1229339205] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:02,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:02,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:02,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1232045246] [2024-06-14 13:52:02,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:02,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:02,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:02,065 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:02,065 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:02,162 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:02,162 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 82 places, 81 transitions, 624 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:02,162 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:02,162 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:02,162 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:02,480 INFO L124 PetriNetUnfolderBase]: 1072/1756 cut-off events. [2024-06-14 13:52:02,480 INFO L125 PetriNetUnfolderBase]: For 11198/11198 co-relation queries the response was YES. [2024-06-14 13:52:02,487 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7415 conditions, 1756 events. 1072/1756 cut-off events. For 11198/11198 co-relation queries the response was YES. Maximal size of possible extension queue 95. Compared 8846 event pairs, 227 based on Foata normal form. 4/1750 useless extension candidates. Maximal degree in co-relation 7378. Up to 1264 conditions per place. [2024-06-14 13:52:02,494 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 71 selfloop transitions, 44 changer transitions 0/121 dead transitions. [2024-06-14 13:52:02,495 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 121 transitions, 1034 flow [2024-06-14 13:52:02,495 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:02,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:02,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 13:52:02,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-14 13:52:02,497 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 624 flow. Second operand 7 states and 176 transitions. [2024-06-14 13:52:02,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 121 transitions, 1034 flow [2024-06-14 13:52:02,516 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 923 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 13:52:02,521 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 652 flow [2024-06-14 13:52:02,521 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=513, PETRI_DIFFERENCE_MINUEND_PLACES=73, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=81, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=39, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=652, PETRI_PLACES=80, PETRI_TRANSITIONS=85} [2024-06-14 13:52:02,522 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-14 13:52:02,522 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 652 flow [2024-06-14 13:52:02,522 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:02,522 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:02,522 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:02,523 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-14 13:52:02,523 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)] === [2024-06-14 13:52:02,523 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:02,523 INFO L85 PathProgramCache]: Analyzing trace with hash 1797032466, now seen corresponding path program 2 times [2024-06-14 13:52:02,523 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:02,524 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2058090902] [2024-06-14 13:52:02,524 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:02,524 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:02,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:02,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:02,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:02,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2058090902] [2024-06-14 13:52:02,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2058090902] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:02,960 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:02,960 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:02,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1780160754] [2024-06-14 13:52:02,960 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:02,960 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:02,961 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:02,961 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:02,961 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:03,008 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:03,009 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 80 places, 85 transitions, 652 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:03,009 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:03,009 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:03,009 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:03,318 INFO L124 PetriNetUnfolderBase]: 1089/1783 cut-off events. [2024-06-14 13:52:03,319 INFO L125 PetriNetUnfolderBase]: For 13001/13001 co-relation queries the response was YES. [2024-06-14 13:52:03,326 INFO L83 FinitePrefix]: Finished finitePrefix Result has 7799 conditions, 1783 events. 1089/1783 cut-off events. For 13001/13001 co-relation queries the response was YES. Maximal size of possible extension queue 96. Compared 9039 event pairs, 313 based on Foata normal form. 4/1777 useless extension candidates. Maximal degree in co-relation 7762. Up to 1488 conditions per place. [2024-06-14 13:52:03,334 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 70 selfloop transitions, 41 changer transitions 0/117 dead transitions. [2024-06-14 13:52:03,334 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 974 flow [2024-06-14 13:52:03,335 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:03,335 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:03,335 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 13:52:03,336 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 13:52:03,336 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 652 flow. Second operand 7 states and 170 transitions. [2024-06-14 13:52:03,336 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 974 flow [2024-06-14 13:52:03,359 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 117 transitions, 909 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:03,361 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 704 flow [2024-06-14 13:52:03,361 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=587, PETRI_DIFFERENCE_MINUEND_PLACES=77, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=85, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=44, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=704, PETRI_PLACES=84, PETRI_TRANSITIONS=87} [2024-06-14 13:52:03,362 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-14 13:52:03,362 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 704 flow [2024-06-14 13:52:03,363 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:03,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:03,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:03,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-14 13:52:03,363 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)] === [2024-06-14 13:52:03,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:03,364 INFO L85 PathProgramCache]: Analyzing trace with hash 1915120146, now seen corresponding path program 3 times [2024-06-14 13:52:03,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:03,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [149763325] [2024-06-14 13:52:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:03,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:03,374 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:03,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:03,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:03,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [149763325] [2024-06-14 13:52:03,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [149763325] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:03,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:03,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:03,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1783208571] [2024-06-14 13:52:03,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:03,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:03,810 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:03,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:03,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:03,861 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:03,862 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 84 places, 87 transitions, 704 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:03,862 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:03,862 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:03,862 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:04,242 INFO L124 PetriNetUnfolderBase]: 1106/1816 cut-off events. [2024-06-14 13:52:04,242 INFO L125 PetriNetUnfolderBase]: For 15179/15179 co-relation queries the response was YES. [2024-06-14 13:52:04,250 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8216 conditions, 1816 events. 1106/1816 cut-off events. For 15179/15179 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9255 event pairs, 301 based on Foata normal form. 4/1814 useless extension candidates. Maximal degree in co-relation 8177. Up to 1589 conditions per place. [2024-06-14 13:52:04,258 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 86 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-06-14 13:52:04,259 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 116 transitions, 1020 flow [2024-06-14 13:52:04,260 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:04,260 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:04,261 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:52:04,261 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:52:04,261 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 704 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:52:04,261 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 116 transitions, 1020 flow [2024-06-14 13:52:04,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 116 transitions, 925 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:04,289 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 696 flow [2024-06-14 13:52:04,290 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=609, PETRI_DIFFERENCE_MINUEND_PLACES=79, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=87, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=22, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=63, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=696, PETRI_PLACES=86, PETRI_TRANSITIONS=89} [2024-06-14 13:52:04,291 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-14 13:52:04,291 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 696 flow [2024-06-14 13:52:04,291 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:04,291 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:04,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:04,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-14 13:52:04,292 INFO L420 AbstractCegarLoop]: === Iteration 16 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:04,292 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:04,292 INFO L85 PathProgramCache]: Analyzing trace with hash 1646935552, now seen corresponding path program 1 times [2024-06-14 13:52:04,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:04,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [600122452] [2024-06-14 13:52:04,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:04,293 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:04,320 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:04,793 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:04,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:04,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [600122452] [2024-06-14 13:52:04,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [600122452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:04,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:04,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:04,798 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [511627398] [2024-06-14 13:52:04,798 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:04,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:04,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:04,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:04,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:04,849 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:04,850 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 86 places, 89 transitions, 696 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:04,850 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:04,850 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:04,850 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:05,121 INFO L124 PetriNetUnfolderBase]: 1071/1773 cut-off events. [2024-06-14 13:52:05,121 INFO L125 PetriNetUnfolderBase]: For 16921/16921 co-relation queries the response was YES. [2024-06-14 13:52:05,129 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8128 conditions, 1773 events. 1071/1773 cut-off events. For 16921/16921 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9131 event pairs, 292 based on Foata normal form. 3/1756 useless extension candidates. Maximal degree in co-relation 8088. Up to 1511 conditions per place. [2024-06-14 13:52:05,137 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 81 selfloop transitions, 28 changer transitions 0/120 dead transitions. [2024-06-14 13:52:05,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 120 transitions, 1094 flow [2024-06-14 13:52:05,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:05,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:05,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-14 13:52:05,139 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-14 13:52:05,139 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 696 flow. Second operand 5 states and 127 transitions. [2024-06-14 13:52:05,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 120 transitions, 1094 flow [2024-06-14 13:52:05,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 120 transitions, 1029 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:05,170 INFO L231 Difference]: Finished difference. Result has 87 places, 102 transitions, 799 flow [2024-06-14 13:52:05,171 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=631, PETRI_DIFFERENCE_MINUEND_PLACES=81, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=89, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=19, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=68, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=799, PETRI_PLACES=87, PETRI_TRANSITIONS=102} [2024-06-14 13:52:05,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-14 13:52:05,171 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 102 transitions, 799 flow [2024-06-14 13:52:05,172 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:05,172 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:05,172 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:05,172 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-14 13:52:05,172 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)] === [2024-06-14 13:52:05,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:05,173 INFO L85 PathProgramCache]: Analyzing trace with hash -156687912, now seen corresponding path program 4 times [2024-06-14 13:52:05,173 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:05,173 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1196208797] [2024-06-14 13:52:05,174 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:05,174 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:05,185 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:05,619 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:05,619 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:05,619 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1196208797] [2024-06-14 13:52:05,619 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1196208797] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:05,620 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:05,620 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:05,620 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1173724913] [2024-06-14 13:52:05,620 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:05,621 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:05,621 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:05,621 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:05,621 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:05,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:05,699 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 87 places, 102 transitions, 799 flow. Second operand has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:05,699 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:05,699 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:05,699 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:06,060 INFO L124 PetriNetUnfolderBase]: 1093/1792 cut-off events. [2024-06-14 13:52:06,060 INFO L125 PetriNetUnfolderBase]: For 18737/18737 co-relation queries the response was YES. [2024-06-14 13:52:06,070 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8347 conditions, 1792 events. 1093/1792 cut-off events. For 18737/18737 co-relation queries the response was YES. Maximal size of possible extension queue 97. Compared 9037 event pairs, 196 based on Foata normal form. 20/1806 useless extension candidates. Maximal degree in co-relation 8305. Up to 1369 conditions per place. [2024-06-14 13:52:06,081 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 89 selfloop transitions, 40 changer transitions 0/135 dead transitions. [2024-06-14 13:52:06,081 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 135 transitions, 1149 flow [2024-06-14 13:52:06,082 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:06,082 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:06,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 13:52:06,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-14 13:52:06,084 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 799 flow. Second operand 7 states and 173 transitions. [2024-06-14 13:52:06,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 135 transitions, 1149 flow [2024-06-14 13:52:06,117 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 135 transitions, 1123 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:06,119 INFO L231 Difference]: Finished difference. Result has 94 places, 102 transitions, 867 flow [2024-06-14 13:52:06,120 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=773, PETRI_DIFFERENCE_MINUEND_PLACES=87, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=62, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=867, PETRI_PLACES=94, PETRI_TRANSITIONS=102} [2024-06-14 13:52:06,121 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-14 13:52:06,121 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 102 transitions, 867 flow [2024-06-14 13:52:06,121 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 14.857142857142858) internal successors, (104), 7 states have internal predecessors, (104), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:06,121 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:06,121 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:06,122 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-14 13:52:06,122 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)] === [2024-06-14 13:52:06,122 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:06,122 INFO L85 PathProgramCache]: Analyzing trace with hash 73776520, now seen corresponding path program 1 times [2024-06-14 13:52:06,122 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:06,123 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1802016366] [2024-06-14 13:52:06,123 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:06,123 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:06,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:06,521 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:06,521 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:06,521 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1802016366] [2024-06-14 13:52:06,521 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1802016366] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:06,521 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:06,522 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:06,522 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [62011786] [2024-06-14 13:52:06,522 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:06,522 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:06,522 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:06,523 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:06,523 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:06,583 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:06,584 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 94 places, 102 transitions, 867 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:06,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:06,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:06,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:06,910 INFO L124 PetriNetUnfolderBase]: 1110/1819 cut-off events. [2024-06-14 13:52:06,911 INFO L125 PetriNetUnfolderBase]: For 19149/19149 co-relation queries the response was YES. [2024-06-14 13:52:06,921 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8744 conditions, 1819 events. 1110/1819 cut-off events. For 19149/19149 co-relation queries the response was YES. Maximal size of possible extension queue 100. Compared 9194 event pairs, 287 based on Foata normal form. 4/1817 useless extension candidates. Maximal degree in co-relation 8699. Up to 1601 conditions per place. [2024-06-14 13:52:06,936 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 97 selfloop transitions, 20 changer transitions 0/123 dead transitions. [2024-06-14 13:52:06,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 123 transitions, 1171 flow [2024-06-14 13:52:06,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:06,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:06,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-14 13:52:06,940 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-14 13:52:06,940 INFO L175 Difference]: Start difference. First operand has 94 places, 102 transitions, 867 flow. Second operand 5 states and 124 transitions. [2024-06-14 13:52:06,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 123 transitions, 1171 flow [2024-06-14 13:52:06,965 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 123 transitions, 1080 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:06,968 INFO L231 Difference]: Finished difference. Result has 93 places, 104 transitions, 849 flow [2024-06-14 13:52:06,968 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=776, PETRI_DIFFERENCE_MINUEND_PLACES=88, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=102, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=849, PETRI_PLACES=93, PETRI_TRANSITIONS=104} [2024-06-14 13:52:06,968 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-14 13:52:06,969 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 104 transitions, 849 flow [2024-06-14 13:52:06,969 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:06,969 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:06,969 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:06,969 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-14 13:52:06,970 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)] === [2024-06-14 13:52:06,970 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:06,970 INFO L85 PathProgramCache]: Analyzing trace with hash 82347400, now seen corresponding path program 2 times [2024-06-14 13:52:06,970 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:06,970 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1152185335] [2024-06-14 13:52:06,970 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:06,971 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:06,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:07,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:07,390 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:07,390 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1152185335] [2024-06-14 13:52:07,390 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1152185335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:07,390 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:07,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:07,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [180583601] [2024-06-14 13:52:07,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:07,393 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:07,394 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:07,394 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:07,394 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:07,432 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:07,433 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 93 places, 104 transitions, 849 flow. Second operand has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:07,433 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:07,433 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:07,433 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:07,728 INFO L124 PetriNetUnfolderBase]: 1102/1814 cut-off events. [2024-06-14 13:52:07,728 INFO L125 PetriNetUnfolderBase]: For 18747/18758 co-relation queries the response was YES. [2024-06-14 13:52:07,737 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8591 conditions, 1814 events. 1102/1814 cut-off events. For 18747/18758 co-relation queries the response was YES. Maximal size of possible extension queue 99. Compared 9253 event pairs, 275 based on Foata normal form. 12/1819 useless extension candidates. Maximal degree in co-relation 8545. Up to 1530 conditions per place. [2024-06-14 13:52:07,750 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 97 selfloop transitions, 20 changer transitions 0/123 dead transitions. [2024-06-14 13:52:07,751 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 123 transitions, 1151 flow [2024-06-14 13:52:07,751 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:07,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:07,752 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 13:52:07,752 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:52:07,752 INFO L175 Difference]: Start difference. First operand has 93 places, 104 transitions, 849 flow. Second operand 5 states and 120 transitions. [2024-06-14 13:52:07,752 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 123 transitions, 1151 flow [2024-06-14 13:52:07,778 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 123 transitions, 1096 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:07,780 INFO L231 Difference]: Finished difference. Result has 95 places, 106 transitions, 871 flow [2024-06-14 13:52:07,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=794, PETRI_DIFFERENCE_MINUEND_PLACES=90, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=104, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=84, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=871, PETRI_PLACES=95, PETRI_TRANSITIONS=106} [2024-06-14 13:52:07,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-14 13:52:07,781 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 106 transitions, 871 flow [2024-06-14 13:52:07,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.166666666666666) internal successors, (91), 6 states have internal predecessors, (91), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:07,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:07,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:07,782 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-14 13:52:07,782 INFO L420 AbstractCegarLoop]: === Iteration 20 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:07,782 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:07,782 INFO L85 PathProgramCache]: Analyzing trace with hash 2053335980, now seen corresponding path program 2 times [2024-06-14 13:52:07,782 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:07,783 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778535784] [2024-06-14 13:52:07,783 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:07,783 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:07,794 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:08,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:08,243 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:08,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778535784] [2024-06-14 13:52:08,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778535784] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:08,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:08,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-14 13:52:08,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [139148959] [2024-06-14 13:52:08,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:08,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-14 13:52:08,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:08,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-14 13:52:08,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-14 13:52:08,294 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:08,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 95 places, 106 transitions, 871 flow. Second operand has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:08,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:08,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:08,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:08,575 INFO L124 PetriNetUnfolderBase]: 1092/1814 cut-off events. [2024-06-14 13:52:08,576 INFO L125 PetriNetUnfolderBase]: For 21052/21052 co-relation queries the response was YES. [2024-06-14 13:52:08,585 INFO L83 FinitePrefix]: Finished finitePrefix Result has 8831 conditions, 1814 events. 1092/1814 cut-off events. For 21052/21052 co-relation queries the response was YES. Maximal size of possible extension queue 105. Compared 9410 event pairs, 272 based on Foata normal form. 6/1804 useless extension candidates. Maximal degree in co-relation 8784. Up to 1536 conditions per place. [2024-06-14 13:52:08,595 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 93 selfloop transitions, 37 changer transitions 0/141 dead transitions. [2024-06-14 13:52:08,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 141 transitions, 1340 flow [2024-06-14 13:52:08,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:08,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:08,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-14 13:52:08,597 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-14 13:52:08,597 INFO L175 Difference]: Start difference. First operand has 95 places, 106 transitions, 871 flow. Second operand 5 states and 131 transitions. [2024-06-14 13:52:08,597 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 141 transitions, 1340 flow [2024-06-14 13:52:08,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 141 transitions, 1281 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:08,639 INFO L231 Difference]: Finished difference. Result has 98 places, 121 transitions, 1076 flow [2024-06-14 13:52:08,639 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=812, PETRI_DIFFERENCE_MINUEND_PLACES=92, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=106, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=72, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1076, PETRI_PLACES=98, PETRI_TRANSITIONS=121} [2024-06-14 13:52:08,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-14 13:52:08,639 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 121 transitions, 1076 flow [2024-06-14 13:52:08,640 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 5 states, 5 states have (on average 16.8) internal successors, (84), 5 states have internal predecessors, (84), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:08,640 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:08,640 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:08,640 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-14 13:52:08,640 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)] === [2024-06-14 13:52:08,641 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:08,641 INFO L85 PathProgramCache]: Analyzing trace with hash -128441090, now seen corresponding path program 1 times [2024-06-14 13:52:08,641 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:08,641 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1696665212] [2024-06-14 13:52:08,641 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:08,641 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:08,650 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:09,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:09,057 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:09,057 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1696665212] [2024-06-14 13:52:09,057 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1696665212] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:09,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:09,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:09,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842687647] [2024-06-14 13:52:09,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:09,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:09,059 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:09,059 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:09,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:09,115 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:09,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 98 places, 121 transitions, 1076 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 13:52:09,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:09,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:09,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:09,447 INFO L124 PetriNetUnfolderBase]: 1254/2068 cut-off events. [2024-06-14 13:52:09,448 INFO L125 PetriNetUnfolderBase]: For 28141/28152 co-relation queries the response was YES. [2024-06-14 13:52:09,458 INFO L83 FinitePrefix]: Finished finitePrefix Result has 10592 conditions, 2068 events. 1254/2068 cut-off events. For 28141/28152 co-relation queries the response was YES. Maximal size of possible extension queue 122. Compared 10976 event pairs, 225 based on Foata normal form. 20/2081 useless extension candidates. Maximal degree in co-relation 10543. Up to 1322 conditions per place. [2024-06-14 13:52:09,468 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 113 selfloop transitions, 40 changer transitions 0/159 dead transitions. [2024-06-14 13:52:09,469 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 159 transitions, 1592 flow [2024-06-14 13:52:09,469 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:09,469 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:09,470 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:52:09,470 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 13:52:09,470 INFO L175 Difference]: Start difference. First operand has 98 places, 121 transitions, 1076 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:52:09,470 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 159 transitions, 1592 flow [2024-06-14 13:52:09,513 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 159 transitions, 1570 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:09,515 INFO L231 Difference]: Finished difference. Result has 104 places, 123 transitions, 1178 flow [2024-06-14 13:52:09,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1054, PETRI_DIFFERENCE_MINUEND_PLACES=97, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=121, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1178, PETRI_PLACES=104, PETRI_TRANSITIONS=123} [2024-06-14 13:52:09,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-14 13:52:09,516 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 123 transitions, 1178 flow [2024-06-14 13:52:09,516 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 13:52:09,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:09,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:09,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-14 13:52:09,517 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)] === [2024-06-14 13:52:09,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:09,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1902778724, now seen corresponding path program 2 times [2024-06-14 13:52:09,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:09,518 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930642427] [2024-06-14 13:52:09,518 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:09,518 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:09,529 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:09,944 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:09,944 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:09,944 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930642427] [2024-06-14 13:52:09,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930642427] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:09,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:09,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:09,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1703722559] [2024-06-14 13:52:09,945 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:09,945 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:09,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:09,947 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:09,947 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:10,005 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:10,007 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 104 places, 123 transitions, 1178 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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) [2024-06-14 13:52:10,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:10,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:10,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:10,487 INFO L124 PetriNetUnfolderBase]: 1312/2169 cut-off events. [2024-06-14 13:52:10,488 INFO L125 PetriNetUnfolderBase]: For 31904/31904 co-relation queries the response was YES. [2024-06-14 13:52:10,499 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11361 conditions, 2169 events. 1312/2169 cut-off events. For 31904/31904 co-relation queries the response was YES. Maximal size of possible extension queue 134. Compared 11662 event pairs, 329 based on Foata normal form. 16/2179 useless extension candidates. Maximal degree in co-relation 11310. Up to 1774 conditions per place. [2024-06-14 13:52:10,507 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 41 changer transitions 0/165 dead transitions. [2024-06-14 13:52:10,508 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 165 transitions, 1630 flow [2024-06-14 13:52:10,508 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:10,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:10,509 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 13:52:10,509 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-14 13:52:10,510 INFO L175 Difference]: Start difference. First operand has 104 places, 123 transitions, 1178 flow. Second operand 9 states and 211 transitions. [2024-06-14 13:52:10,510 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 165 transitions, 1630 flow [2024-06-14 13:52:10,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 165 transitions, 1580 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:10,562 INFO L231 Difference]: Finished difference. Result has 110 places, 124 transitions, 1239 flow [2024-06-14 13:52:10,562 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1128, PETRI_DIFFERENCE_MINUEND_PLACES=101, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=123, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=82, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1239, PETRI_PLACES=110, PETRI_TRANSITIONS=124} [2024-06-14 13:52:10,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-14 13:52:10,562 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 124 transitions, 1239 flow [2024-06-14 13:52:10,563 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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) [2024-06-14 13:52:10,563 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:10,563 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:10,563 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-14 13:52:10,563 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)] === [2024-06-14 13:52:10,564 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:10,564 INFO L85 PathProgramCache]: Analyzing trace with hash -1667743104, now seen corresponding path program 3 times [2024-06-14 13:52:10,564 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:10,564 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906802508] [2024-06-14 13:52:10,564 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:10,564 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:10,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:10,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:10,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906802508] [2024-06-14 13:52:10,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906802508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:10,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:10,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:10,940 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490965394] [2024-06-14 13:52:10,940 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:10,940 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:10,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:10,941 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:10,941 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:10,987 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:10,987 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 124 transitions, 1239 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 13:52:10,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:10,988 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:10,988 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:11,389 INFO L124 PetriNetUnfolderBase]: 1353/2247 cut-off events. [2024-06-14 13:52:11,390 INFO L125 PetriNetUnfolderBase]: For 35457/35468 co-relation queries the response was YES. [2024-06-14 13:52:11,402 INFO L83 FinitePrefix]: Finished finitePrefix Result has 11943 conditions, 2247 events. 1353/2247 cut-off events. For 35457/35468 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12273 event pairs, 343 based on Foata normal form. 20/2260 useless extension candidates. Maximal degree in co-relation 11890. Up to 1758 conditions per place. [2024-06-14 13:52:11,411 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 116 selfloop transitions, 36 changer transitions 0/158 dead transitions. [2024-06-14 13:52:11,411 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 158 transitions, 1665 flow [2024-06-14 13:52:11,412 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:11,412 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:11,413 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-14 13:52:11,413 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-14 13:52:11,413 INFO L175 Difference]: Start difference. First operand has 110 places, 124 transitions, 1239 flow. Second operand 7 states and 169 transitions. [2024-06-14 13:52:11,413 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 158 transitions, 1665 flow [2024-06-14 13:52:11,472 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 158 transitions, 1576 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:11,475 INFO L231 Difference]: Finished difference. Result has 110 places, 125 transitions, 1252 flow [2024-06-14 13:52:11,475 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1150, PETRI_DIFFERENCE_MINUEND_PLACES=103, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=124, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=35, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=88, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1252, PETRI_PLACES=110, PETRI_TRANSITIONS=125} [2024-06-14 13:52:11,475 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-14 13:52:11,476 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 125 transitions, 1252 flow [2024-06-14 13:52:11,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 13:52:11,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:11,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:11,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-14 13:52:11,476 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)] === [2024-06-14 13:52:11,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:11,477 INFO L85 PathProgramCache]: Analyzing trace with hash -142192784, now seen corresponding path program 1 times [2024-06-14 13:52:11,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:11,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1910868846] [2024-06-14 13:52:11,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:11,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:11,490 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:11,955 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:11,956 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:11,956 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1910868846] [2024-06-14 13:52:11,956 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1910868846] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:11,956 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:11,956 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:11,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [928200198] [2024-06-14 13:52:11,957 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:11,957 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:11,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:11,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:11,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:12,010 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:12,010 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 110 places, 125 transitions, 1252 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:12,010 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:12,010 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:12,010 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:12,348 INFO L124 PetriNetUnfolderBase]: 1358/2270 cut-off events. [2024-06-14 13:52:12,348 INFO L125 PetriNetUnfolderBase]: For 35346/35346 co-relation queries the response was YES. [2024-06-14 13:52:12,360 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12060 conditions, 2270 events. 1358/2270 cut-off events. For 35346/35346 co-relation queries the response was YES. Maximal size of possible extension queue 142. Compared 12494 event pairs, 329 based on Foata normal form. 1/2270 useless extension candidates. Maximal degree in co-relation 12006. Up to 2053 conditions per place. [2024-06-14 13:52:12,371 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 134 selfloop transitions, 22 changer transitions 0/162 dead transitions. [2024-06-14 13:52:12,371 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 162 transitions, 1752 flow [2024-06-14 13:52:12,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:12,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:12,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-14 13:52:12,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 13:52:12,373 INFO L175 Difference]: Start difference. First operand has 110 places, 125 transitions, 1252 flow. Second operand 6 states and 142 transitions. [2024-06-14 13:52:12,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 162 transitions, 1752 flow [2024-06-14 13:52:12,444 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 162 transitions, 1668 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:12,446 INFO L231 Difference]: Finished difference. Result has 113 places, 139 transitions, 1339 flow [2024-06-14 13:52:12,447 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1168, PETRI_DIFFERENCE_MINUEND_PLACES=105, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=125, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=11, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=108, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1339, PETRI_PLACES=113, PETRI_TRANSITIONS=139} [2024-06-14 13:52:12,448 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-14 13:52:12,448 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 139 transitions, 1339 flow [2024-06-14 13:52:12,448 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:12,448 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:12,448 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:12,449 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-14 13:52:12,449 INFO L420 AbstractCegarLoop]: === Iteration 25 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:12,449 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:12,449 INFO L85 PathProgramCache]: Analyzing trace with hash 1911793416, now seen corresponding path program 4 times [2024-06-14 13:52:12,449 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:12,449 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [757001089] [2024-06-14 13:52:12,450 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:12,450 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:12,461 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:12,851 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:12,852 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:12,852 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [757001089] [2024-06-14 13:52:12,852 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [757001089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:12,852 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:12,852 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:12,853 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1645383822] [2024-06-14 13:52:12,853 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:12,853 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:12,853 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:12,854 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:12,854 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:12,899 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:12,900 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 113 places, 139 transitions, 1339 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 13:52:12,900 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:12,900 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:12,900 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:13,299 INFO L124 PetriNetUnfolderBase]: 1416/2374 cut-off events. [2024-06-14 13:52:13,299 INFO L125 PetriNetUnfolderBase]: For 42266/42280 co-relation queries the response was YES. [2024-06-14 13:52:13,307 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12744 conditions, 2374 events. 1416/2374 cut-off events. For 42266/42280 co-relation queries the response was YES. Maximal size of possible extension queue 152. Compared 13313 event pairs, 361 based on Foata normal form. 26/2394 useless extension candidates. Maximal degree in co-relation 12687. Up to 1968 conditions per place. [2024-06-14 13:52:13,316 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 134 selfloop transitions, 34 changer transitions 0/174 dead transitions. [2024-06-14 13:52:13,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 174 transitions, 1797 flow [2024-06-14 13:52:13,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:13,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:13,318 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:52:13,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 13:52:13,318 INFO L175 Difference]: Start difference. First operand has 113 places, 139 transitions, 1339 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:52:13,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 174 transitions, 1797 flow [2024-06-14 13:52:13,395 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 174 transitions, 1777 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:13,397 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1420 flow [2024-06-14 13:52:13,398 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1319, PETRI_DIFFERENCE_MINUEND_PLACES=113, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=139, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1420, PETRI_PLACES=121, PETRI_TRANSITIONS=140} [2024-06-14 13:52:13,398 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-14 13:52:13,398 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1420 flow [2024-06-14 13:52:13,398 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 13:52:13,399 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:13,399 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:13,399 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-14 13:52:13,399 INFO L420 AbstractCegarLoop]: === Iteration 26 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:13,400 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:13,400 INFO L85 PathProgramCache]: Analyzing trace with hash 224251932, now seen corresponding path program 5 times [2024-06-14 13:52:13,400 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:13,400 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1528988454] [2024-06-14 13:52:13,400 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:13,400 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:13,409 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:13,835 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:13,835 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:13,835 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1528988454] [2024-06-14 13:52:13,835 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1528988454] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:13,835 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:13,835 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:13,835 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1219000764] [2024-06-14 13:52:13,835 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:13,836 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:13,836 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:13,836 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:13,837 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:13,888 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:13,888 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 121 places, 140 transitions, 1420 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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) [2024-06-14 13:52:13,888 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:13,889 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:13,889 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:14,348 INFO L124 PetriNetUnfolderBase]: 1449/2434 cut-off events. [2024-06-14 13:52:14,348 INFO L125 PetriNetUnfolderBase]: For 45498/45498 co-relation queries the response was YES. [2024-06-14 13:52:14,358 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13204 conditions, 2434 events. 1449/2434 cut-off events. For 45498/45498 co-relation queries the response was YES. Maximal size of possible extension queue 160. Compared 13729 event pairs, 363 based on Foata normal form. 16/2444 useless extension candidates. Maximal degree in co-relation 13144. Up to 2027 conditions per place. [2024-06-14 13:52:14,370 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 133 selfloop transitions, 35 changer transitions 0/174 dead transitions. [2024-06-14 13:52:14,370 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 174 transitions, 1878 flow [2024-06-14 13:52:14,371 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:14,371 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:14,371 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:52:14,372 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 13:52:14,372 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1420 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:52:14,372 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 174 transitions, 1878 flow [2024-06-14 13:52:14,443 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 174 transitions, 1799 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:14,446 INFO L231 Difference]: Finished difference. Result has 122 places, 141 transitions, 1446 flow [2024-06-14 13:52:14,446 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1341, PETRI_DIFFERENCE_MINUEND_PLACES=115, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=140, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1446, PETRI_PLACES=122, PETRI_TRANSITIONS=141} [2024-06-14 13:52:14,446 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-14 13:52:14,446 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 141 transitions, 1446 flow [2024-06-14 13:52:14,447 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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) [2024-06-14 13:52:14,447 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:14,447 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:14,447 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-14 13:52:14,447 INFO L420 AbstractCegarLoop]: === Iteration 27 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:14,447 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:14,448 INFO L85 PathProgramCache]: Analyzing trace with hash -760816356, now seen corresponding path program 6 times [2024-06-14 13:52:14,448 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:14,448 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1082331819] [2024-06-14 13:52:14,448 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:14,448 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:14,458 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:14,893 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:14,894 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:14,894 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1082331819] [2024-06-14 13:52:14,894 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1082331819] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:14,894 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:14,894 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:14,894 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [220135404] [2024-06-14 13:52:14,895 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:14,895 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:14,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:14,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:14,897 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:14,961 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:14,962 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 122 places, 141 transitions, 1446 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 13:52:14,962 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:14,962 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:14,962 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:15,325 INFO L124 PetriNetUnfolderBase]: 1429/2409 cut-off events. [2024-06-14 13:52:15,325 INFO L125 PetriNetUnfolderBase]: For 44556/44567 co-relation queries the response was YES. [2024-06-14 13:52:15,333 INFO L83 FinitePrefix]: Finished finitePrefix Result has 12847 conditions, 2409 events. 1429/2409 cut-off events. For 44556/44567 co-relation queries the response was YES. Maximal size of possible extension queue 158. Compared 13649 event pairs, 273 based on Foata normal form. 20/2422 useless extension candidates. Maximal degree in co-relation 12786. Up to 1666 conditions per place. [2024-06-14 13:52:15,340 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 128 selfloop transitions, 36 changer transitions 0/170 dead transitions. [2024-06-14 13:52:15,340 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 170 transitions, 1866 flow [2024-06-14 13:52:15,340 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:15,340 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:15,341 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-14 13:52:15,341 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-14 13:52:15,341 INFO L175 Difference]: Start difference. First operand has 122 places, 141 transitions, 1446 flow. Second operand 6 states and 149 transitions. [2024-06-14 13:52:15,341 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 170 transitions, 1866 flow [2024-06-14 13:52:15,420 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 170 transitions, 1777 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:15,421 INFO L231 Difference]: Finished difference. Result has 123 places, 141 transitions, 1436 flow [2024-06-14 13:52:15,422 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1357, PETRI_DIFFERENCE_MINUEND_PLACES=117, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=105, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1436, PETRI_PLACES=123, PETRI_TRANSITIONS=141} [2024-06-14 13:52:15,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-14 13:52:15,422 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 141 transitions, 1436 flow [2024-06-14 13:52:15,422 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 13:52:15,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:15,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:15,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-14 13:52:15,422 INFO L420 AbstractCegarLoop]: === Iteration 28 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:15,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:15,423 INFO L85 PathProgramCache]: Analyzing trace with hash 229829514, now seen corresponding path program 1 times [2024-06-14 13:52:15,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:15,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1640543861] [2024-06-14 13:52:15,423 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:15,423 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:15,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:15,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:15,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:15,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1640543861] [2024-06-14 13:52:15,797 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1640543861] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:15,797 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:15,797 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:52:15,797 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1044681711] [2024-06-14 13:52:15,797 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:15,798 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:52:15,798 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:15,798 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:52:15,798 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:52:15,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:15,895 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 123 places, 141 transitions, 1436 flow. Second operand has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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) [2024-06-14 13:52:15,895 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:15,895 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:15,895 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:16,361 INFO L124 PetriNetUnfolderBase]: 1470/2487 cut-off events. [2024-06-14 13:52:16,361 INFO L125 PetriNetUnfolderBase]: For 46182/46185 co-relation queries the response was YES. [2024-06-14 13:52:16,371 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13164 conditions, 2487 events. 1470/2487 cut-off events. For 46182/46185 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 14177 event pairs, 312 based on Foata normal form. 14/2499 useless extension candidates. Maximal degree in co-relation 13102. Up to 1869 conditions per place. [2024-06-14 13:52:16,379 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 139 selfloop transitions, 41 changer transitions 0/186 dead transitions. [2024-06-14 13:52:16,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 186 transitions, 1944 flow [2024-06-14 13:52:16,380 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:16,380 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:16,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 13:52:16,381 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 13:52:16,381 INFO L175 Difference]: Start difference. First operand has 123 places, 141 transitions, 1436 flow. Second operand 9 states and 213 transitions. [2024-06-14 13:52:16,381 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 186 transitions, 1944 flow [2024-06-14 13:52:16,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 186 transitions, 1840 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:16,439 INFO L231 Difference]: Finished difference. Result has 127 places, 142 transitions, 1442 flow [2024-06-14 13:52:16,439 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1332, PETRI_DIFFERENCE_MINUEND_PLACES=118, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=141, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=40, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=100, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=1442, PETRI_PLACES=127, PETRI_TRANSITIONS=142} [2024-06-14 13:52:16,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-14 13:52:16,439 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 142 transitions, 1442 flow [2024-06-14 13:52:16,440 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 14.75) internal successors, (118), 8 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) [2024-06-14 13:52:16,440 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:16,440 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:16,440 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-14 13:52:16,440 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)] === [2024-06-14 13:52:16,441 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:16,441 INFO L85 PathProgramCache]: Analyzing trace with hash 1454240436, now seen corresponding path program 2 times [2024-06-14 13:52:16,441 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:16,441 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1937470845] [2024-06-14 13:52:16,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:16,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:16,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:16,794 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:16,795 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:16,795 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1937470845] [2024-06-14 13:52:16,795 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1937470845] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:16,795 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:16,795 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:16,795 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1447788277] [2024-06-14 13:52:16,795 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:16,795 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:16,795 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:16,796 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:16,796 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:16,825 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:16,826 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 127 places, 142 transitions, 1442 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:16,826 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:16,826 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:16,826 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:17,131 INFO L124 PetriNetUnfolderBase]: 1475/2495 cut-off events. [2024-06-14 13:52:17,131 INFO L125 PetriNetUnfolderBase]: For 45197/45197 co-relation queries the response was YES. [2024-06-14 13:52:17,141 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13221 conditions, 2495 events. 1475/2495 cut-off events. For 45197/45197 co-relation queries the response was YES. Maximal size of possible extension queue 165. Compared 14297 event pairs, 353 based on Foata normal form. 1/2495 useless extension candidates. Maximal degree in co-relation 13158. Up to 2255 conditions per place. [2024-06-14 13:52:17,149 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 132 selfloop transitions, 25 changer transitions 0/163 dead transitions. [2024-06-14 13:52:17,149 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 163 transitions, 1877 flow [2024-06-14 13:52:17,149 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:17,149 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:17,150 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-14 13:52:17,150 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-14 13:52:17,150 INFO L175 Difference]: Start difference. First operand has 127 places, 142 transitions, 1442 flow. Second operand 6 states and 137 transitions. [2024-06-14 13:52:17,150 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 163 transitions, 1877 flow [2024-06-14 13:52:17,200 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 163 transitions, 1783 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:17,202 INFO L231 Difference]: Finished difference. Result has 126 places, 146 transitions, 1431 flow [2024-06-14 13:52:17,202 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1348, PETRI_DIFFERENCE_MINUEND_PLACES=120, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=142, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=21, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=121, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1431, PETRI_PLACES=126, PETRI_TRANSITIONS=146} [2024-06-14 13:52:17,203 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-14 13:52:17,203 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 146 transitions, 1431 flow [2024-06-14 13:52:17,204 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:17,204 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:17,204 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:17,204 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-14 13:52:17,204 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)] === [2024-06-14 13:52:17,204 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:17,205 INFO L85 PathProgramCache]: Analyzing trace with hash 1454240808, now seen corresponding path program 1 times [2024-06-14 13:52:17,205 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:17,205 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [839184453] [2024-06-14 13:52:17,205 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:17,205 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:17,214 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:17,633 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:17,634 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:17,634 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [839184453] [2024-06-14 13:52:17,634 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [839184453] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:17,634 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:17,634 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:17,634 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1896168214] [2024-06-14 13:52:17,635 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:17,635 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:17,635 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:17,636 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:17,636 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:17,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:17,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 126 places, 146 transitions, 1431 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) [2024-06-14 13:52:17,683 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:17,683 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:17,683 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:18,034 INFO L124 PetriNetUnfolderBase]: 1446/2461 cut-off events. [2024-06-14 13:52:18,034 INFO L125 PetriNetUnfolderBase]: For 48630/48630 co-relation queries the response was YES. [2024-06-14 13:52:18,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13007 conditions, 2461 events. 1446/2461 cut-off events. For 48630/48630 co-relation queries the response was YES. Maximal size of possible extension queue 168. Compared 14253 event pairs, 362 based on Foata normal form. 3/2444 useless extension candidates. Maximal degree in co-relation 12943. Up to 2040 conditions per place. [2024-06-14 13:52:18,060 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 102 selfloop transitions, 57 changer transitions 0/176 dead transitions. [2024-06-14 13:52:18,060 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 176 transitions, 2029 flow [2024-06-14 13:52:18,060 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:18,061 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:18,061 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-14 13:52:18,061 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-14 13:52:18,061 INFO L175 Difference]: Start difference. First operand has 126 places, 146 transitions, 1431 flow. Second operand 6 states and 148 transitions. [2024-06-14 13:52:18,062 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 176 transitions, 2029 flow [2024-06-14 13:52:18,146 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 176 transitions, 1993 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:18,149 INFO L231 Difference]: Finished difference. Result has 131 places, 158 transitions, 1686 flow [2024-06-14 13:52:18,149 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1395, PETRI_DIFFERENCE_MINUEND_PLACES=124, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=146, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=96, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1686, PETRI_PLACES=131, PETRI_TRANSITIONS=158} [2024-06-14 13:52:18,150 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-14 13:52:18,150 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 158 transitions, 1686 flow [2024-06-14 13:52:18,150 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) [2024-06-14 13:52:18,150 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:18,150 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:18,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-14 13:52:18,151 INFO L420 AbstractCegarLoop]: === Iteration 31 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:18,151 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:18,151 INFO L85 PathProgramCache]: Analyzing trace with hash 463477148, now seen corresponding path program 2 times [2024-06-14 13:52:18,151 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:18,151 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [714094115] [2024-06-14 13:52:18,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:18,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:18,171 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:18,519 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:18,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:18,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [714094115] [2024-06-14 13:52:18,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [714094115] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:18,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:18,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:18,521 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894131092] [2024-06-14 13:52:18,521 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:18,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:18,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:18,522 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:18,522 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:18,585 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:18,586 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 131 places, 158 transitions, 1686 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 13:52:18,586 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:18,586 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:18,586 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:19,026 INFO L124 PetriNetUnfolderBase]: 1539/2611 cut-off events. [2024-06-14 13:52:19,026 INFO L125 PetriNetUnfolderBase]: For 56536/56536 co-relation queries the response was YES. [2024-06-14 13:52:19,036 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14322 conditions, 2611 events. 1539/2611 cut-off events. For 56536/56536 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15118 event pairs, 268 based on Foata normal form. 12/2617 useless extension candidates. Maximal degree in co-relation 14256. Up to 2023 conditions per place. [2024-06-14 13:52:19,044 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 150 selfloop transitions, 43 changer transitions 0/199 dead transitions. [2024-06-14 13:52:19,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 199 transitions, 2214 flow [2024-06-14 13:52:19,045 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:19,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:19,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 13:52:19,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-14 13:52:19,045 INFO L175 Difference]: Start difference. First operand has 131 places, 158 transitions, 1686 flow. Second operand 8 states and 195 transitions. [2024-06-14 13:52:19,046 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 199 transitions, 2214 flow [2024-06-14 13:52:19,114 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 199 transitions, 2157 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:19,117 INFO L231 Difference]: Finished difference. Result has 138 places, 159 transitions, 1747 flow [2024-06-14 13:52:19,117 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1631, PETRI_DIFFERENCE_MINUEND_PLACES=130, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=115, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=1747, PETRI_PLACES=138, PETRI_TRANSITIONS=159} [2024-06-14 13:52:19,117 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-14 13:52:19,117 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 159 transitions, 1747 flow [2024-06-14 13:52:19,118 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 13:52:19,118 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:19,118 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:19,118 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-14 13:52:19,118 INFO L420 AbstractCegarLoop]: === Iteration 32 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:19,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:19,119 INFO L85 PathProgramCache]: Analyzing trace with hash -1742196820, now seen corresponding path program 3 times [2024-06-14 13:52:19,119 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:19,119 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [828259558] [2024-06-14 13:52:19,119 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:19,119 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:19,133 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:19,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:19,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:19,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [828259558] [2024-06-14 13:52:19,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [828259558] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:19,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:19,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:19,480 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [751675690] [2024-06-14 13:52:19,480 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:19,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:19,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:19,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:19,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:19,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:19,567 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 159 transitions, 1747 flow. Second operand has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 13:52:19,567 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:19,567 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:19,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:19,935 INFO L124 PetriNetUnfolderBase]: 1519/2586 cut-off events. [2024-06-14 13:52:19,935 INFO L125 PetriNetUnfolderBase]: For 56167/56178 co-relation queries the response was YES. [2024-06-14 13:52:19,946 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13883 conditions, 2586 events. 1519/2586 cut-off events. For 56167/56178 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 15048 event pairs, 259 based on Foata normal form. 20/2599 useless extension candidates. Maximal degree in co-relation 13814. Up to 1531 conditions per place. [2024-06-14 13:52:19,953 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 144 selfloop transitions, 42 changer transitions 0/192 dead transitions. [2024-06-14 13:52:19,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 192 transitions, 2171 flow [2024-06-14 13:52:19,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:19,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:19,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-14 13:52:19,962 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-14 13:52:19,963 INFO L175 Difference]: Start difference. First operand has 138 places, 159 transitions, 1747 flow. Second operand 7 states and 170 transitions. [2024-06-14 13:52:19,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 192 transitions, 2171 flow [2024-06-14 13:52:20,049 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 192 transitions, 2065 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:20,052 INFO L231 Difference]: Finished difference. Result has 138 places, 158 transitions, 1679 flow [2024-06-14 13:52:20,052 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1591, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=42, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=116, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=1679, PETRI_PLACES=138, PETRI_TRANSITIONS=158} [2024-06-14 13:52:20,052 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-14 13:52:20,053 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 158 transitions, 1679 flow [2024-06-14 13:52:20,053 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.0) internal successors, (105), 7 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) [2024-06-14 13:52:20,053 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:20,053 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:20,053 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-14 13:52:20,053 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)] === [2024-06-14 13:52:20,054 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:20,054 INFO L85 PathProgramCache]: Analyzing trace with hash 1808503848, now seen corresponding path program 2 times [2024-06-14 13:52:20,054 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:20,054 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1637667089] [2024-06-14 13:52:20,054 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:20,054 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:20,064 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:20,407 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:20,408 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:20,408 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1637667089] [2024-06-14 13:52:20,408 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1637667089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:20,408 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:20,408 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:20,408 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [832301477] [2024-06-14 13:52:20,408 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:20,409 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:20,409 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:20,409 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:20,409 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:20,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:20,467 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 158 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) [2024-06-14 13:52:20,467 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:20,467 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:20,467 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:20,819 INFO L124 PetriNetUnfolderBase]: 1492/2561 cut-off events. [2024-06-14 13:52:20,819 INFO L125 PetriNetUnfolderBase]: For 52455/52455 co-relation queries the response was YES. [2024-06-14 13:52:20,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13777 conditions, 2561 events. 1492/2561 cut-off events. For 52455/52455 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15087 event pairs, 353 based on Foata normal form. 3/2548 useless extension candidates. Maximal degree in co-relation 13707. Up to 2163 conditions per place. [2024-06-14 13:52:20,841 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 123 selfloop transitions, 50 changer transitions 0/190 dead transitions. [2024-06-14 13:52:20,841 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 190 transitions, 2326 flow [2024-06-14 13:52:20,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:20,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:20,842 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 13:52:20,842 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:52:20,842 INFO L175 Difference]: Start difference. First operand has 138 places, 158 transitions, 1679 flow. Second operand 6 states and 150 transitions. [2024-06-14 13:52:20,842 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 190 transitions, 2326 flow [2024-06-14 13:52:20,919 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 190 transitions, 2183 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:20,921 INFO L231 Difference]: Finished difference. Result has 138 places, 168 transitions, 1804 flow [2024-06-14 13:52:20,922 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1536, PETRI_DIFFERENCE_MINUEND_PLACES=131, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=158, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=43, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=111, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=1804, PETRI_PLACES=138, PETRI_TRANSITIONS=168} [2024-06-14 13:52:20,922 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-14 13:52:20,922 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 168 transitions, 1804 flow [2024-06-14 13:52:20,922 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) [2024-06-14 13:52:20,922 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:20,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:20,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-14 13:52:20,922 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:20,923 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:20,923 INFO L85 PathProgramCache]: Analyzing trace with hash -124926554, now seen corresponding path program 3 times [2024-06-14 13:52:20,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:20,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [129607005] [2024-06-14 13:52:20,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:20,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:20,933 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:21,262 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:21,262 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:21,262 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [129607005] [2024-06-14 13:52:21,263 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [129607005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:21,263 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:21,263 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:21,263 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968630959] [2024-06-14 13:52:21,263 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:21,263 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:21,264 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:21,264 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:21,264 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:21,310 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:21,310 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 138 places, 168 transitions, 1804 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:21,310 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:21,310 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:21,310 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:21,663 INFO L124 PetriNetUnfolderBase]: 1546/2629 cut-off events. [2024-06-14 13:52:21,663 INFO L125 PetriNetUnfolderBase]: For 53705/53705 co-relation queries the response was YES. [2024-06-14 13:52:21,674 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13886 conditions, 2629 events. 1546/2629 cut-off events. For 53705/53705 co-relation queries the response was YES. Maximal size of possible extension queue 180. Compared 15326 event pairs, 357 based on Foata normal form. 2/2630 useless extension candidates. Maximal degree in co-relation 13816. Up to 2365 conditions per place. [2024-06-14 13:52:21,684 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 166 selfloop transitions, 26 changer transitions 0/198 dead transitions. [2024-06-14 13:52:21,685 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 198 transitions, 2319 flow [2024-06-14 13:52:21,685 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:21,685 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:21,686 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-14 13:52:21,686 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-14 13:52:21,686 INFO L175 Difference]: Start difference. First operand has 138 places, 168 transitions, 1804 flow. Second operand 5 states and 126 transitions. [2024-06-14 13:52:21,686 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 198 transitions, 2319 flow [2024-06-14 13:52:21,763 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 198 transitions, 2272 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:21,765 INFO L231 Difference]: Finished difference. Result has 144 places, 177 transitions, 1934 flow [2024-06-14 13:52:21,765 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1759, PETRI_DIFFERENCE_MINUEND_PLACES=137, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=168, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=18, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=144, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=1934, PETRI_PLACES=144, PETRI_TRANSITIONS=177} [2024-06-14 13:52:21,766 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-14 13:52:21,766 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 177 transitions, 1934 flow [2024-06-14 13:52:21,766 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:21,766 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:21,766 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:21,766 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-14 13:52:21,767 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:21,767 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:21,767 INFO L85 PathProgramCache]: Analyzing trace with hash 2123651450, now seen corresponding path program 1 times [2024-06-14 13:52:21,767 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:21,767 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168558347] [2024-06-14 13:52:21,767 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:21,768 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:21,777 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:22,197 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:22,197 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:22,197 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168558347] [2024-06-14 13:52:22,197 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168558347] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:22,197 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:22,197 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:22,197 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1478124929] [2024-06-14 13:52:22,198 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:22,198 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:22,198 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:22,198 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:22,198 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:22,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:22,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 144 places, 177 transitions, 1934 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:22,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:22,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:22,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:22,577 INFO L124 PetriNetUnfolderBase]: 1548/2644 cut-off events. [2024-06-14 13:52:22,577 INFO L125 PetriNetUnfolderBase]: For 57788/57802 co-relation queries the response was YES. [2024-06-14 13:52:22,588 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14315 conditions, 2644 events. 1548/2644 cut-off events. For 57788/57802 co-relation queries the response was YES. Maximal size of possible extension queue 181. Compared 15583 event pairs, 380 based on Foata normal form. 12/2650 useless extension candidates. Maximal degree in co-relation 14241. Up to 2287 conditions per place. [2024-06-14 13:52:22,597 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 149 selfloop transitions, 41 changer transitions 0/196 dead transitions. [2024-06-14 13:52:22,597 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 196 transitions, 2528 flow [2024-06-14 13:52:22,597 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:22,597 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:22,597 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-14 13:52:22,598 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:52:22,598 INFO L175 Difference]: Start difference. First operand has 144 places, 177 transitions, 1934 flow. Second operand 5 states and 120 transitions. [2024-06-14 13:52:22,598 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 196 transitions, 2528 flow [2024-06-14 13:52:22,703 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 196 transitions, 2518 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-14 13:52:22,706 INFO L231 Difference]: Finished difference. Result has 150 places, 182 transitions, 2100 flow [2024-06-14 13:52:22,706 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=1924, PETRI_DIFFERENCE_MINUEND_PLACES=144, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=177, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=36, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=140, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2100, PETRI_PLACES=150, PETRI_TRANSITIONS=182} [2024-06-14 13:52:22,706 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-14 13:52:22,706 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 182 transitions, 2100 flow [2024-06-14 13:52:22,707 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:22,707 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:22,707 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:22,707 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-14 13:52:22,707 INFO L420 AbstractCegarLoop]: === Iteration 36 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:22,707 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:22,707 INFO L85 PathProgramCache]: Analyzing trace with hash -1449518836, now seen corresponding path program 2 times [2024-06-14 13:52:22,707 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:22,707 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1096420485] [2024-06-14 13:52:22,707 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:22,707 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:22,716 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:23,089 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:23,089 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:23,089 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1096420485] [2024-06-14 13:52:23,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1096420485] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:23,090 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:23,090 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:23,090 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1604599398] [2024-06-14 13:52:23,090 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:23,090 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:23,091 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:23,091 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:23,091 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:23,158 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:23,158 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 150 places, 182 transitions, 2100 flow. Second operand has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:23,158 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:23,158 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:23,158 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:23,478 INFO L124 PetriNetUnfolderBase]: 1530/2612 cut-off events. [2024-06-14 13:52:23,478 INFO L125 PetriNetUnfolderBase]: For 58875/58878 co-relation queries the response was YES. [2024-06-14 13:52:23,490 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14326 conditions, 2612 events. 1530/2612 cut-off events. For 58875/58878 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15333 event pairs, 358 based on Foata normal form. 6/2616 useless extension candidates. Maximal degree in co-relation 14248. Up to 2267 conditions per place. [2024-06-14 13:52:23,498 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 149 selfloop transitions, 45 changer transitions 0/200 dead transitions. [2024-06-14 13:52:23,499 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 200 transitions, 2534 flow [2024-06-14 13:52:23,499 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-14 13:52:23,499 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-14 13:52:23,500 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-14 13:52:23,500 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-14 13:52:23,500 INFO L175 Difference]: Start difference. First operand has 150 places, 182 transitions, 2100 flow. Second operand 5 states and 127 transitions. [2024-06-14 13:52:23,500 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 200 transitions, 2534 flow [2024-06-14 13:52:23,599 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 200 transitions, 2455 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:23,602 INFO L231 Difference]: Finished difference. Result has 154 places, 182 transitions, 2132 flow [2024-06-14 13:52:23,603 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2021, PETRI_DIFFERENCE_MINUEND_PLACES=149, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=137, PETRI_DIFFERENCE_SUBTRAHEND_STATES=5, PETRI_FLOW=2132, PETRI_PLACES=154, PETRI_TRANSITIONS=182} [2024-06-14 13:52:23,603 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-14 13:52:23,603 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 182 transitions, 2132 flow [2024-06-14 13:52:23,604 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 15.5) internal successors, (93), 6 states have internal predecessors, (93), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:23,604 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:23,604 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:23,604 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-14 13:52:23,604 INFO L420 AbstractCegarLoop]: === Iteration 37 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:23,604 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:23,605 INFO L85 PathProgramCache]: Analyzing trace with hash -133432892, now seen corresponding path program 1 times [2024-06-14 13:52:23,605 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:23,605 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [446643086] [2024-06-14 13:52:23,605 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:23,605 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:23,614 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:23,982 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:23,982 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:23,982 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [446643086] [2024-06-14 13:52:23,982 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [446643086] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:23,982 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:23,982 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-14 13:52:23,983 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1442226190] [2024-06-14 13:52:23,983 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:23,984 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-14 13:52:23,984 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:23,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-14 13:52:23,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-14 13:52:24,027 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:24,027 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 182 transitions, 2132 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) [2024-06-14 13:52:24,027 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:24,028 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:24,028 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:24,400 INFO L124 PetriNetUnfolderBase]: 1472/2517 cut-off events. [2024-06-14 13:52:24,400 INFO L125 PetriNetUnfolderBase]: For 60456/60456 co-relation queries the response was YES. [2024-06-14 13:52:24,417 INFO L83 FinitePrefix]: Finished finitePrefix Result has 13951 conditions, 2517 events. 1472/2517 cut-off events. For 60456/60456 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 14723 event pairs, 347 based on Foata normal form. 4/2505 useless extension candidates. Maximal degree in co-relation 13871. Up to 2238 conditions per place. [2024-06-14 13:52:24,425 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 159 selfloop transitions, 14 changer transitions 0/193 dead transitions. [2024-06-14 13:52:24,425 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 193 transitions, 2522 flow [2024-06-14 13:52:24,425 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-14 13:52:24,425 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-14 13:52:24,426 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-14 13:52:24,426 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:52:24,426 INFO L175 Difference]: Start difference. First operand has 154 places, 182 transitions, 2132 flow. Second operand 4 states and 96 transitions. [2024-06-14 13:52:24,426 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 193 transitions, 2522 flow [2024-06-14 13:52:24,504 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 193 transitions, 2453 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:24,506 INFO L231 Difference]: Finished difference. Result has 154 places, 184 transitions, 2123 flow [2024-06-14 13:52:24,506 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2063, PETRI_DIFFERENCE_MINUEND_PLACES=150, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=182, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=12, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=168, PETRI_DIFFERENCE_SUBTRAHEND_STATES=4, PETRI_FLOW=2123, PETRI_PLACES=154, PETRI_TRANSITIONS=184} [2024-06-14 13:52:24,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-14 13:52:24,507 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 184 transitions, 2123 flow [2024-06-14 13:52:24,508 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) [2024-06-14 13:52:24,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:24,508 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:24,508 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-14 13:52:24,508 INFO L420 AbstractCegarLoop]: === Iteration 38 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:24,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:24,509 INFO L85 PathProgramCache]: Analyzing trace with hash -2147097898, now seen corresponding path program 1 times [2024-06-14 13:52:24,509 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:24,509 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1524469143] [2024-06-14 13:52:24,509 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:24,509 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:24,517 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:24,837 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:24,838 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:24,838 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1524469143] [2024-06-14 13:52:24,838 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1524469143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:24,838 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:24,838 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:24,839 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036174155] [2024-06-14 13:52:24,839 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:24,839 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:24,839 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:24,840 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:24,840 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:24,881 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:24,881 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 154 places, 184 transitions, 2123 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:24,881 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:24,881 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:24,881 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:25,191 INFO L124 PetriNetUnfolderBase]: 1525/2587 cut-off events. [2024-06-14 13:52:25,191 INFO L125 PetriNetUnfolderBase]: For 58557/58557 co-relation queries the response was YES. [2024-06-14 13:52:25,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14259 conditions, 2587 events. 1525/2587 cut-off events. For 58557/58557 co-relation queries the response was YES. Maximal size of possible extension queue 174. Compared 15040 event pairs, 349 based on Foata normal form. 1/2587 useless extension candidates. Maximal degree in co-relation 14179. Up to 2308 conditions per place. [2024-06-14 13:52:25,212 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 172 selfloop transitions, 41 changer transitions 0/219 dead transitions. [2024-06-14 13:52:25,212 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 219 transitions, 2759 flow [2024-06-14 13:52:25,216 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:25,216 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:25,217 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 13:52:25,217 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:52:25,217 INFO L175 Difference]: Start difference. First operand has 154 places, 184 transitions, 2123 flow. Second operand 7 states and 161 transitions. [2024-06-14 13:52:25,217 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 219 transitions, 2759 flow [2024-06-14 13:52:25,326 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 219 transitions, 2717 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:25,329 INFO L231 Difference]: Finished difference. Result has 160 places, 195 transitions, 2284 flow [2024-06-14 13:52:25,329 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2081, PETRI_DIFFERENCE_MINUEND_PLACES=152, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=184, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=33, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=147, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2284, PETRI_PLACES=160, PETRI_TRANSITIONS=195} [2024-06-14 13:52:25,329 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-14 13:52:25,329 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 195 transitions, 2284 flow [2024-06-14 13:52:25,329 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:25,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:25,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:25,329 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-14 13:52:25,329 INFO L420 AbstractCegarLoop]: === Iteration 39 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:25,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:25,330 INFO L85 PathProgramCache]: Analyzing trace with hash -2137832308, now seen corresponding path program 2 times [2024-06-14 13:52:25,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:25,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [914688308] [2024-06-14 13:52:25,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:25,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:25,339 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:25,734 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:25,734 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:25,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [914688308] [2024-06-14 13:52:25,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [914688308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:25,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:25,735 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:25,735 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1917352626] [2024-06-14 13:52:25,735 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:25,736 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:25,736 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:25,736 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:25,736 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:25,795 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:25,796 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 160 places, 195 transitions, 2284 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:25,796 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:25,796 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:25,796 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:26,134 INFO L124 PetriNetUnfolderBase]: 1538/2609 cut-off events. [2024-06-14 13:52:26,134 INFO L125 PetriNetUnfolderBase]: For 63158/63158 co-relation queries the response was YES. [2024-06-14 13:52:26,148 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14792 conditions, 2609 events. 1538/2609 cut-off events. For 63158/63158 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15202 event pairs, 349 based on Foata normal form. 1/2609 useless extension candidates. Maximal degree in co-relation 14710. Up to 2323 conditions per place. [2024-06-14 13:52:26,156 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 169 selfloop transitions, 46 changer transitions 0/221 dead transitions. [2024-06-14 13:52:26,156 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 221 transitions, 2971 flow [2024-06-14 13:52:26,156 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:26,156 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:26,157 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 13:52:26,157 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 13:52:26,157 INFO L175 Difference]: Start difference. First operand has 160 places, 195 transitions, 2284 flow. Second operand 7 states and 157 transitions. [2024-06-14 13:52:26,157 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 221 transitions, 2971 flow [2024-06-14 13:52:26,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 221 transitions, 2927 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:26,242 INFO L231 Difference]: Finished difference. Result has 165 places, 202 transitions, 2413 flow [2024-06-14 13:52:26,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2246, PETRI_DIFFERENCE_MINUEND_PLACES=158, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=195, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=39, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=156, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2413, PETRI_PLACES=165, PETRI_TRANSITIONS=202} [2024-06-14 13:52:26,242 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-14 13:52:26,242 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 202 transitions, 2413 flow [2024-06-14 13:52:26,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:26,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:26,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-14 13:52:26,243 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:26,243 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:26,243 INFO L85 PathProgramCache]: Analyzing trace with hash 2131781644, now seen corresponding path program 3 times [2024-06-14 13:52:26,243 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:26,243 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [75689725] [2024-06-14 13:52:26,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:26,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:26,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:26,553 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:26,554 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:26,554 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [75689725] [2024-06-14 13:52:26,554 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [75689725] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:26,554 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:26,554 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:26,554 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1981719788] [2024-06-14 13:52:26,554 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:26,554 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:26,554 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:26,555 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:26,555 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:26,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:26,602 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 165 places, 202 transitions, 2413 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:26,602 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:26,602 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:26,602 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:27,118 INFO L124 PetriNetUnfolderBase]: 1535/2605 cut-off events. [2024-06-14 13:52:27,119 INFO L125 PetriNetUnfolderBase]: For 65846/65846 co-relation queries the response was YES. [2024-06-14 13:52:27,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14877 conditions, 2605 events. 1535/2605 cut-off events. For 65846/65846 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15168 event pairs, 349 based on Foata normal form. 1/2605 useless extension candidates. Maximal degree in co-relation 14793. Up to 2320 conditions per place. [2024-06-14 13:52:27,142 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 169 selfloop transitions, 45 changer transitions 0/220 dead transitions. [2024-06-14 13:52:27,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 220 transitions, 2955 flow [2024-06-14 13:52:27,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:27,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:27,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 13:52:27,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 13:52:27,143 INFO L175 Difference]: Start difference. First operand has 165 places, 202 transitions, 2413 flow. Second operand 7 states and 157 transitions. [2024-06-14 13:52:27,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 220 transitions, 2955 flow [2024-06-14 13:52:27,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 220 transitions, 2860 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:27,240 INFO L231 Difference]: Finished difference. Result has 169 places, 202 transitions, 2414 flow [2024-06-14 13:52:27,240 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2318, PETRI_DIFFERENCE_MINUEND_PLACES=162, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=45, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=157, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2414, PETRI_PLACES=169, PETRI_TRANSITIONS=202} [2024-06-14 13:52:27,240 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-14 13:52:27,240 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 202 transitions, 2414 flow [2024-06-14 13:52:27,240 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:27,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:27,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:27,241 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-14 13:52:27,241 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:27,241 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:27,241 INFO L85 PathProgramCache]: Analyzing trace with hash 530254348, now seen corresponding path program 4 times [2024-06-14 13:52:27,241 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:27,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1927838870] [2024-06-14 13:52:27,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:27,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:27,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:27,645 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:27,645 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:27,645 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1927838870] [2024-06-14 13:52:27,645 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1927838870] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:27,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:27,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:27,646 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1573443760] [2024-06-14 13:52:27,646 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:27,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:27,650 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:27,651 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:27,651 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:27,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:27,696 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 169 places, 202 transitions, 2414 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:27,696 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:27,696 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:27,697 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:28,048 INFO L124 PetriNetUnfolderBase]: 1540/2614 cut-off events. [2024-06-14 13:52:28,049 INFO L125 PetriNetUnfolderBase]: For 69319/69319 co-relation queries the response was YES. [2024-06-14 13:52:28,062 INFO L83 FinitePrefix]: Finished finitePrefix Result has 14999 conditions, 2614 events. 1540/2614 cut-off events. For 69319/69319 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15207 event pairs, 349 based on Foata normal form. 1/2614 useless extension candidates. Maximal degree in co-relation 14914. Up to 2347 conditions per place. [2024-06-14 13:52:28,070 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 184 selfloop transitions, 32 changer transitions 0/222 dead transitions. [2024-06-14 13:52:28,070 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 222 transitions, 2999 flow [2024-06-14 13:52:28,070 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:28,070 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:28,071 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-14 13:52:28,071 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:52:28,071 INFO L175 Difference]: Start difference. First operand has 169 places, 202 transitions, 2414 flow. Second operand 6 states and 138 transitions. [2024-06-14 13:52:28,071 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 222 transitions, 2999 flow [2024-06-14 13:52:28,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 222 transitions, 2919 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:28,240 INFO L231 Difference]: Finished difference. Result has 171 places, 205 transitions, 2443 flow [2024-06-14 13:52:28,241 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2340, PETRI_DIFFERENCE_MINUEND_PLACES=165, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=202, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=173, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2443, PETRI_PLACES=171, PETRI_TRANSITIONS=205} [2024-06-14 13:52:28,241 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-14 13:52:28,241 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 205 transitions, 2443 flow [2024-06-14 13:52:28,241 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:28,241 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:28,241 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:28,242 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-14 13:52:28,242 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:28,242 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:28,242 INFO L85 PathProgramCache]: Analyzing trace with hash 145188910, now seen corresponding path program 5 times [2024-06-14 13:52:28,242 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:28,242 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [14080410] [2024-06-14 13:52:28,242 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:28,242 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:28,250 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:28,667 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:28,668 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:28,668 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [14080410] [2024-06-14 13:52:28,668 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [14080410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:28,668 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:28,668 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:28,668 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [96443477] [2024-06-14 13:52:28,669 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:28,669 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:28,669 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:28,669 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:28,670 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:28,707 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:28,708 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 171 places, 205 transitions, 2443 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:28,708 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:28,708 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:28,709 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:29,104 INFO L124 PetriNetUnfolderBase]: 1537/2610 cut-off events. [2024-06-14 13:52:29,104 INFO L125 PetriNetUnfolderBase]: For 71901/71901 co-relation queries the response was YES. [2024-06-14 13:52:29,120 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15011 conditions, 2610 events. 1537/2610 cut-off events. For 71901/71901 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15201 event pairs, 349 based on Foata normal form. 1/2610 useless extension candidates. Maximal degree in co-relation 14925. Up to 2344 conditions per place. [2024-06-14 13:52:29,128 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 187 selfloop transitions, 34 changer transitions 0/227 dead transitions. [2024-06-14 13:52:29,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 227 transitions, 2941 flow [2024-06-14 13:52:29,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:29,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:29,130 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-14 13:52:29,130 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-14 13:52:29,130 INFO L175 Difference]: Start difference. First operand has 171 places, 205 transitions, 2443 flow. Second operand 6 states and 143 transitions. [2024-06-14 13:52:29,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 227 transitions, 2941 flow [2024-06-14 13:52:29,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 227 transitions, 2805 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:29,257 INFO L231 Difference]: Finished difference. Result has 172 places, 205 transitions, 2381 flow [2024-06-14 13:52:29,258 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2307, PETRI_DIFFERENCE_MINUEND_PLACES=166, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2381, PETRI_PLACES=172, PETRI_TRANSITIONS=205} [2024-06-14 13:52:29,258 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-14 13:52:29,258 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 205 transitions, 2381 flow [2024-06-14 13:52:29,258 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:29,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:29,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:29,259 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-14 13:52:29,259 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:29,259 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:29,259 INFO L85 PathProgramCache]: Analyzing trace with hash -965069260, now seen corresponding path program 1 times [2024-06-14 13:52:29,260 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:29,260 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047183925] [2024-06-14 13:52:29,260 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:29,260 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:29,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:29,641 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:29,641 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:29,641 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047183925] [2024-06-14 13:52:29,642 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047183925] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:29,642 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:29,642 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:29,642 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1702690487] [2024-06-14 13:52:29,642 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:29,642 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:29,643 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:29,643 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:29,643 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:29,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:29,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 172 places, 205 transitions, 2381 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:29,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:29,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:29,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:30,058 INFO L124 PetriNetUnfolderBase]: 1539/2621 cut-off events. [2024-06-14 13:52:30,058 INFO L125 PetriNetUnfolderBase]: For 77050/77064 co-relation queries the response was YES. [2024-06-14 13:52:30,074 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15017 conditions, 2621 events. 1539/2621 cut-off events. For 77050/77064 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15353 event pairs, 389 based on Foata normal form. 12/2627 useless extension candidates. Maximal degree in co-relation 14931. Up to 2196 conditions per place. [2024-06-14 13:52:30,082 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 143 selfloop transitions, 74 changer transitions 0/223 dead transitions. [2024-06-14 13:52:30,082 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 223 transitions, 3048 flow [2024-06-14 13:52:30,083 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:30,083 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:30,083 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 13:52:30,083 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 13:52:30,083 INFO L175 Difference]: Start difference. First operand has 172 places, 205 transitions, 2381 flow. Second operand 6 states and 140 transitions. [2024-06-14 13:52:30,084 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 223 transitions, 3048 flow [2024-06-14 13:52:30,239 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 223 transitions, 2970 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:30,242 INFO L231 Difference]: Finished difference. Result has 174 places, 208 transitions, 2503 flow [2024-06-14 13:52:30,242 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2303, PETRI_DIFFERENCE_MINUEND_PLACES=168, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=205, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=134, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2503, PETRI_PLACES=174, PETRI_TRANSITIONS=208} [2024-06-14 13:52:30,243 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-14 13:52:30,243 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 208 transitions, 2503 flow [2024-06-14 13:52:30,243 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,243 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:30,243 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:30,243 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-14 13:52:30,243 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:30,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:30,244 INFO L85 PathProgramCache]: Analyzing trace with hash -1985409868, now seen corresponding path program 2 times [2024-06-14 13:52:30,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:30,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1666311455] [2024-06-14 13:52:30,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:30,244 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:30,252 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:30,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:30,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:30,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1666311455] [2024-06-14 13:52:30,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1666311455] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:30,646 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:30,646 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:30,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1530199184] [2024-06-14 13:52:30,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:30,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:30,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:30,647 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:30,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:30,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:30,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 174 places, 208 transitions, 2503 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:30,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:30,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:30,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:31,105 INFO L124 PetriNetUnfolderBase]: 1541/2621 cut-off events. [2024-06-14 13:52:31,105 INFO L125 PetriNetUnfolderBase]: For 78303/78306 co-relation queries the response was YES. [2024-06-14 13:52:31,121 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15259 conditions, 2621 events. 1541/2621 cut-off events. For 78303/78306 co-relation queries the response was YES. Maximal size of possible extension queue 176. Compared 15338 event pairs, 352 based on Foata normal form. 4/2623 useless extension candidates. Maximal degree in co-relation 15172. Up to 2258 conditions per place. [2024-06-14 13:52:31,130 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 167 selfloop transitions, 59 changer transitions 0/232 dead transitions. [2024-06-14 13:52:31,130 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 232 transitions, 3217 flow [2024-06-14 13:52:31,130 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:31,131 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:31,131 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-14 13:52:31,131 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:52:31,131 INFO L175 Difference]: Start difference. First operand has 174 places, 208 transitions, 2503 flow. Second operand 6 states and 147 transitions. [2024-06-14 13:52:31,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 232 transitions, 3217 flow [2024-06-14 13:52:31,288 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 232 transitions, 3016 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:31,291 INFO L231 Difference]: Finished difference. Result has 176 places, 211 transitions, 2481 flow [2024-06-14 13:52:31,291 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2308, PETRI_DIFFERENCE_MINUEND_PLACES=170, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=208, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=152, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=2481, PETRI_PLACES=176, PETRI_TRANSITIONS=211} [2024-06-14 13:52:31,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-14 13:52:31,292 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 211 transitions, 2481 flow [2024-06-14 13:52:31,292 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:31,292 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:31,292 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:31,292 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-14 13:52:31,293 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:31,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:31,293 INFO L85 PathProgramCache]: Analyzing trace with hash 1365253521, now seen corresponding path program 1 times [2024-06-14 13:52:31,293 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:31,293 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1580604562] [2024-06-14 13:52:31,293 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:31,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:31,303 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:31,680 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:31,680 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:31,680 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1580604562] [2024-06-14 13:52:31,680 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1580604562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:31,680 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:31,681 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:31,681 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [979101076] [2024-06-14 13:52:31,681 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:31,681 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:31,681 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:31,682 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:31,682 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:31,731 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:31,731 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 176 places, 211 transitions, 2481 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:31,731 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:31,731 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:31,731 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:32,099 INFO L124 PetriNetUnfolderBase]: 1549/2632 cut-off events. [2024-06-14 13:52:32,099 INFO L125 PetriNetUnfolderBase]: For 81218/81218 co-relation queries the response was YES. [2024-06-14 13:52:32,113 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15312 conditions, 2632 events. 1549/2632 cut-off events. For 81218/81218 co-relation queries the response was YES. Maximal size of possible extension queue 177. Compared 15332 event pairs, 264 based on Foata normal form. 2/2633 useless extension candidates. Maximal degree in co-relation 15225. Up to 2320 conditions per place. [2024-06-14 13:52:32,120 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 207 selfloop transitions, 31 changer transitions 0/244 dead transitions. [2024-06-14 13:52:32,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 244 transitions, 3137 flow [2024-06-14 13:52:32,123 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:32,123 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:32,124 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 13:52:32,124 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-14 13:52:32,124 INFO L175 Difference]: Start difference. First operand has 176 places, 211 transitions, 2481 flow. Second operand 7 states and 162 transitions. [2024-06-14 13:52:32,124 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 244 transitions, 3137 flow [2024-06-14 13:52:32,246 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 244 transitions, 2989 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:32,249 INFO L231 Difference]: Finished difference. Result has 179 places, 215 transitions, 2432 flow [2024-06-14 13:52:32,249 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2333, PETRI_DIFFERENCE_MINUEND_PLACES=172, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=211, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=182, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2432, PETRI_PLACES=179, PETRI_TRANSITIONS=215} [2024-06-14 13:52:32,250 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-14 13:52:32,250 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 215 transitions, 2432 flow [2024-06-14 13:52:32,250 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:32,250 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:32,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:32,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-14 13:52:32,251 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:32,251 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:32,251 INFO L85 PathProgramCache]: Analyzing trace with hash -2135535191, now seen corresponding path program 2 times [2024-06-14 13:52:32,251 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:32,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2123762282] [2024-06-14 13:52:32,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:32,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:32,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:32,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:32,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:32,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2123762282] [2024-06-14 13:52:32,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2123762282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:32,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:32,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:32,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1882285121] [2024-06-14 13:52:32,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:32,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:32,593 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:32,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:32,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:32,629 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:32,629 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 179 places, 215 transitions, 2432 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:32,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:32,630 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:32,630 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:32,972 INFO L124 PetriNetUnfolderBase]: 1557/2644 cut-off events. [2024-06-14 13:52:32,973 INFO L125 PetriNetUnfolderBase]: For 84788/84788 co-relation queries the response was YES. [2024-06-14 13:52:32,993 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15412 conditions, 2644 events. 1557/2644 cut-off events. For 84788/84788 co-relation queries the response was YES. Maximal size of possible extension queue 178. Compared 15413 event pairs, 343 based on Foata normal form. 2/2645 useless extension candidates. Maximal degree in co-relation 15324. Up to 2377 conditions per place. [2024-06-14 13:52:33,000 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 207 selfloop transitions, 28 changer transitions 0/241 dead transitions. [2024-06-14 13:52:33,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 241 transitions, 2980 flow [2024-06-14 13:52:33,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:33,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:33,001 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 13:52:33,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 13:52:33,002 INFO L175 Difference]: Start difference. First operand has 179 places, 215 transitions, 2432 flow. Second operand 7 states and 157 transitions. [2024-06-14 13:52:33,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 241 transitions, 2980 flow [2024-06-14 13:52:33,154 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 241 transitions, 2924 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:33,157 INFO L231 Difference]: Finished difference. Result has 183 places, 217 transitions, 2459 flow [2024-06-14 13:52:33,157 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2384, PETRI_DIFFERENCE_MINUEND_PLACES=176, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=215, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=26, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=187, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2459, PETRI_PLACES=183, PETRI_TRANSITIONS=217} [2024-06-14 13:52:33,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-14 13:52:33,158 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 217 transitions, 2459 flow [2024-06-14 13:52:33,158 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:33,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:33,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:33,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-14 13:52:33,159 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-14 13:52:33,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:33,159 INFO L85 PathProgramCache]: Analyzing trace with hash 1368113457, now seen corresponding path program 1 times [2024-06-14 13:52:33,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:33,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1047120559] [2024-06-14 13:52:33,160 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:33,160 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:33,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:33,468 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:33,469 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:33,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1047120559] [2024-06-14 13:52:33,469 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1047120559] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:33,469 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:33,469 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:33,469 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1656407662] [2024-06-14 13:52:33,469 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:33,469 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:33,469 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:33,470 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:33,470 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:33,510 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:33,510 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 183 places, 217 transitions, 2459 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:33,510 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:33,510 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:33,510 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:33,905 INFO L124 PetriNetUnfolderBase]: 1578/2663 cut-off events. [2024-06-14 13:52:33,906 INFO L125 PetriNetUnfolderBase]: For 89814/89814 co-relation queries the response was YES. [2024-06-14 13:52:33,919 INFO L83 FinitePrefix]: Finished finitePrefix Result has 15768 conditions, 2663 events. 1578/2663 cut-off events. For 89814/89814 co-relation queries the response was YES. Maximal size of possible extension queue 182. Compared 15507 event pairs, 371 based on Foata normal form. 1/2654 useless extension candidates. Maximal degree in co-relation 15678. Up to 2187 conditions per place. [2024-06-14 13:52:33,925 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 178 selfloop transitions, 76 changer transitions 0/260 dead transitions. [2024-06-14 13:52:33,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 260 transitions, 3525 flow [2024-06-14 13:52:33,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:33,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:33,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 13:52:33,927 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-14 13:52:33,927 INFO L175 Difference]: Start difference. First operand has 183 places, 217 transitions, 2459 flow. Second operand 7 states and 173 transitions. [2024-06-14 13:52:33,927 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 260 transitions, 3525 flow [2024-06-14 13:52:34,060 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 260 transitions, 3470 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:34,063 INFO L231 Difference]: Finished difference. Result has 185 places, 230 transitions, 2718 flow [2024-06-14 13:52:34,063 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2404, PETRI_DIFFERENCE_MINUEND_PLACES=178, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=217, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=150, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2718, PETRI_PLACES=185, PETRI_TRANSITIONS=230} [2024-06-14 13:52:34,063 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-14 13:52:34,063 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 230 transitions, 2718 flow [2024-06-14 13:52:34,063 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:34,063 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:34,063 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:34,064 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-14 13:52:34,064 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)] === [2024-06-14 13:52:34,064 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:34,064 INFO L85 PathProgramCache]: Analyzing trace with hash -1407616041, now seen corresponding path program 2 times [2024-06-14 13:52:34,064 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:34,064 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378870284] [2024-06-14 13:52:34,064 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:34,065 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:34,072 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:34,421 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:34,421 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:34,421 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378870284] [2024-06-14 13:52:34,421 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378870284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:34,421 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:34,421 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:34,421 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [290958940] [2024-06-14 13:52:34,421 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:34,422 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:34,422 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:34,422 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:34,422 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:34,456 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:34,457 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 185 places, 230 transitions, 2718 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:34,457 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:34,457 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:34,457 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:34,854 INFO L124 PetriNetUnfolderBase]: 1599/2696 cut-off events. [2024-06-14 13:52:34,855 INFO L125 PetriNetUnfolderBase]: For 97599/97599 co-relation queries the response was YES. [2024-06-14 13:52:34,870 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16661 conditions, 2696 events. 1599/2696 cut-off events. For 97599/97599 co-relation queries the response was YES. Maximal size of possible extension queue 186. Compared 15752 event pairs, 371 based on Foata normal form. 1/2687 useless extension candidates. Maximal degree in co-relation 16570. Up to 2206 conditions per place. [2024-06-14 13:52:34,879 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 83 changer transitions 0/264 dead transitions. [2024-06-14 13:52:34,879 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 264 transitions, 3740 flow [2024-06-14 13:52:34,879 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:34,880 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:34,880 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:52:34,880 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 13:52:34,880 INFO L175 Difference]: Start difference. First operand has 185 places, 230 transitions, 2718 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:52:34,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 264 transitions, 3740 flow [2024-06-14 13:52:35,048 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 264 transitions, 3630 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-14 13:52:35,051 INFO L231 Difference]: Finished difference. Result has 191 places, 237 transitions, 2876 flow [2024-06-14 13:52:35,051 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2634, PETRI_DIFFERENCE_MINUEND_PLACES=184, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=230, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=154, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2876, PETRI_PLACES=191, PETRI_TRANSITIONS=237} [2024-06-14 13:52:35,051 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-14 13:52:35,052 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 237 transitions, 2876 flow [2024-06-14 13:52:35,052 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:35,052 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:35,052 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:35,052 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-14 13:52:35,052 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)] === [2024-06-14 13:52:35,052 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:35,052 INFO L85 PathProgramCache]: Analyzing trace with hash -936107351, now seen corresponding path program 3 times [2024-06-14 13:52:35,053 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:35,053 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [322004540] [2024-06-14 13:52:35,053 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:35,053 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:35,061 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:35,504 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:35,505 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:35,505 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [322004540] [2024-06-14 13:52:35,505 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [322004540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:35,505 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:35,505 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:35,505 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1484532981] [2024-06-14 13:52:35,505 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:35,506 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:35,506 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:35,506 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:35,506 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:35,567 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:35,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 191 places, 237 transitions, 2876 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:35,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:35,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:35,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:35,992 INFO L124 PetriNetUnfolderBase]: 1607/2716 cut-off events. [2024-06-14 13:52:35,992 INFO L125 PetriNetUnfolderBase]: For 102769/102769 co-relation queries the response was YES. [2024-06-14 13:52:36,012 INFO L83 FinitePrefix]: Finished finitePrefix Result has 16990 conditions, 2716 events. 1607/2716 cut-off events. For 102769/102769 co-relation queries the response was YES. Maximal size of possible extension queue 188. Compared 15855 event pairs, 342 based on Foata normal form. 2/2717 useless extension candidates. Maximal degree in co-relation 16896. Up to 2447 conditions per place. [2024-06-14 13:52:36,021 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 224 selfloop transitions, 27 changer transitions 0/257 dead transitions. [2024-06-14 13:52:36,021 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 257 transitions, 3436 flow [2024-06-14 13:52:36,021 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:36,021 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:36,022 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-14 13:52:36,022 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-14 13:52:36,022 INFO L175 Difference]: Start difference. First operand has 191 places, 237 transitions, 2876 flow. Second operand 7 states and 152 transitions. [2024-06-14 13:52:36,022 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 257 transitions, 3436 flow [2024-06-14 13:52:36,187 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 257 transitions, 3295 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:36,191 INFO L231 Difference]: Finished difference. Result has 195 places, 239 transitions, 2812 flow [2024-06-14 13:52:36,191 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2735, PETRI_DIFFERENCE_MINUEND_PLACES=188, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=237, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=25, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=210, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=2812, PETRI_PLACES=195, PETRI_TRANSITIONS=239} [2024-06-14 13:52:36,191 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-14 13:52:36,191 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 239 transitions, 2812 flow [2024-06-14 13:52:36,192 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:36,192 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:36,192 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:36,192 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-14 13:52:36,192 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)] === [2024-06-14 13:52:36,192 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:36,192 INFO L85 PathProgramCache]: Analyzing trace with hash 1483404627, now seen corresponding path program 3 times [2024-06-14 13:52:36,192 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:36,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [314489223] [2024-06-14 13:52:36,192 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:36,192 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:36,200 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:36,548 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:36,548 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:36,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [314489223] [2024-06-14 13:52:36,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [314489223] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:36,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:36,549 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:36,549 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272156412] [2024-06-14 13:52:36,549 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:36,549 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:36,549 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:36,550 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:36,550 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:36,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:36,621 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 195 places, 239 transitions, 2812 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:36,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:36,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:36,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:36,993 INFO L124 PetriNetUnfolderBase]: 1630/2746 cut-off events. [2024-06-14 13:52:36,993 INFO L125 PetriNetUnfolderBase]: For 107246/107246 co-relation queries the response was YES. [2024-06-14 13:52:37,009 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17158 conditions, 2746 events. 1630/2746 cut-off events. For 107246/107246 co-relation queries the response was YES. Maximal size of possible extension queue 191. Compared 16034 event pairs, 359 based on Foata normal form. 1/2741 useless extension candidates. Maximal degree in co-relation 17063. Up to 2383 conditions per place. [2024-06-14 13:52:37,018 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 211 selfloop transitions, 60 changer transitions 0/277 dead transitions. [2024-06-14 13:52:37,019 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 277 transitions, 3857 flow [2024-06-14 13:52:37,019 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:37,019 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:37,019 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 13:52:37,020 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 13:52:37,020 INFO L175 Difference]: Start difference. First operand has 195 places, 239 transitions, 2812 flow. Second operand 7 states and 166 transitions. [2024-06-14 13:52:37,020 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 277 transitions, 3857 flow [2024-06-14 13:52:37,207 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 277 transitions, 3800 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:37,211 INFO L231 Difference]: Finished difference. Result has 198 places, 251 transitions, 3071 flow [2024-06-14 13:52:37,211 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2755, PETRI_DIFFERENCE_MINUEND_PLACES=190, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=239, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=185, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3071, PETRI_PLACES=198, PETRI_TRANSITIONS=251} [2024-06-14 13:52:37,211 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-14 13:52:37,211 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 251 transitions, 3071 flow [2024-06-14 13:52:37,212 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:37,212 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:37,212 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:37,212 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-14 13:52:37,212 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)] === [2024-06-14 13:52:37,212 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:37,212 INFO L85 PathProgramCache]: Analyzing trace with hash 1483703157, now seen corresponding path program 4 times [2024-06-14 13:52:37,212 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:37,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1827539560] [2024-06-14 13:52:37,213 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:37,213 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:37,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:37,526 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:37,526 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:37,527 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1827539560] [2024-06-14 13:52:37,527 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1827539560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:37,527 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:37,527 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:37,527 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1768828971] [2024-06-14 13:52:37,527 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:37,527 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:37,527 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:37,527 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:37,528 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:37,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:37,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 198 places, 251 transitions, 3071 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:37,569 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:37,569 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:37,569 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:37,984 INFO L124 PetriNetUnfolderBase]: 1640/2762 cut-off events. [2024-06-14 13:52:37,984 INFO L125 PetriNetUnfolderBase]: For 112152/112152 co-relation queries the response was YES. [2024-06-14 13:52:38,002 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17540 conditions, 2762 events. 1640/2762 cut-off events. For 112152/112152 co-relation queries the response was YES. Maximal size of possible extension queue 193. Compared 16141 event pairs, 359 based on Foata normal form. 1/2757 useless extension candidates. Maximal degree in co-relation 17443. Up to 2391 conditions per place. [2024-06-14 13:52:38,011 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 67 changer transitions 0/285 dead transitions. [2024-06-14 13:52:38,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 285 transitions, 4064 flow [2024-06-14 13:52:38,012 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:38,012 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:38,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 13:52:38,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-14 13:52:38,013 INFO L175 Difference]: Start difference. First operand has 198 places, 251 transitions, 3071 flow. Second operand 9 states and 200 transitions. [2024-06-14 13:52:38,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 285 transitions, 4064 flow [2024-06-14 13:52:38,261 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 285 transitions, 3946 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:38,264 INFO L231 Difference]: Finished difference. Result has 205 places, 257 transitions, 3184 flow [2024-06-14 13:52:38,264 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=2970, PETRI_DIFFERENCE_MINUEND_PLACES=196, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=251, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=190, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3184, PETRI_PLACES=205, PETRI_TRANSITIONS=257} [2024-06-14 13:52:38,265 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-14 13:52:38,265 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 257 transitions, 3184 flow [2024-06-14 13:52:38,265 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:38,265 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:38,265 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:38,265 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-14 13:52:38,265 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)] === [2024-06-14 13:52:38,265 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:38,265 INFO L85 PathProgramCache]: Analyzing trace with hash 1138018579, now seen corresponding path program 1 times [2024-06-14 13:52:38,266 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:38,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1208722067] [2024-06-14 13:52:38,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:38,266 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:38,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:38,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:38,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:38,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1208722067] [2024-06-14 13:52:38,602 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1208722067] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:38,602 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:38,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:38,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [740827502] [2024-06-14 13:52:38,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:38,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:38,603 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:38,603 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:38,603 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:38,646 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:38,646 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 205 places, 257 transitions, 3184 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:38,647 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:38,647 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:38,647 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:39,101 INFO L124 PetriNetUnfolderBase]: 1645/2773 cut-off events. [2024-06-14 13:52:39,101 INFO L125 PetriNetUnfolderBase]: For 116626/116626 co-relation queries the response was YES. [2024-06-14 13:52:39,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 17702 conditions, 2773 events. 1645/2773 cut-off events. For 116626/116626 co-relation queries the response was YES. Maximal size of possible extension queue 195. Compared 16251 event pairs, 359 based on Foata normal form. 1/2768 useless extension candidates. Maximal degree in co-relation 17604. Up to 2418 conditions per place. [2024-06-14 13:52:39,138 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 218 selfloop transitions, 58 changer transitions 0/282 dead transitions. [2024-06-14 13:52:39,138 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 282 transitions, 4026 flow [2024-06-14 13:52:39,139 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:39,139 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:39,139 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 13:52:39,140 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:52:39,140 INFO L175 Difference]: Start difference. First operand has 205 places, 257 transitions, 3184 flow. Second operand 7 states and 161 transitions. [2024-06-14 13:52:39,140 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 282 transitions, 4026 flow [2024-06-14 13:52:39,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 282 transitions, 3872 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:39,405 INFO L231 Difference]: Finished difference. Result has 206 places, 260 transitions, 3200 flow [2024-06-14 13:52:39,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3036, PETRI_DIFFERENCE_MINUEND_PLACES=199, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=257, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=55, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=202, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3200, PETRI_PLACES=206, PETRI_TRANSITIONS=260} [2024-06-14 13:52:39,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-14 13:52:39,405 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 260 transitions, 3200 flow [2024-06-14 13:52:39,406 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:39,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:39,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:39,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-14 13:52:39,406 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)] === [2024-06-14 13:52:39,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:39,406 INFO L85 PathProgramCache]: Analyzing trace with hash -1848644885, now seen corresponding path program 5 times [2024-06-14 13:52:39,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:39,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [38292370] [2024-06-14 13:52:39,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:39,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:39,415 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:39,719 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:39,720 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:39,720 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [38292370] [2024-06-14 13:52:39,720 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [38292370] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:39,720 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:39,720 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:39,720 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1676734410] [2024-06-14 13:52:39,720 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:39,720 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:39,720 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:39,721 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:39,721 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:39,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:39,752 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 206 places, 260 transitions, 3200 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:39,752 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:39,752 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:39,752 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:40,156 INFO L124 PetriNetUnfolderBase]: 1674/2813 cut-off events. [2024-06-14 13:52:40,156 INFO L125 PetriNetUnfolderBase]: For 124767/124767 co-relation queries the response was YES. [2024-06-14 13:52:40,175 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18136 conditions, 2813 events. 1674/2813 cut-off events. For 124767/124767 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16481 event pairs, 371 based on Foata normal form. 1/2804 useless extension candidates. Maximal degree in co-relation 18037. Up to 2267 conditions per place. [2024-06-14 13:52:40,184 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 109 changer transitions 0/291 dead transitions. [2024-06-14 13:52:40,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 291 transitions, 4324 flow [2024-06-14 13:52:40,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:40,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:40,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-14 13:52:40,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-14 13:52:40,185 INFO L175 Difference]: Start difference. First operand has 206 places, 260 transitions, 3200 flow. Second operand 7 states and 166 transitions. [2024-06-14 13:52:40,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 291 transitions, 4324 flow [2024-06-14 13:52:40,456 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 291 transitions, 4194 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:40,460 INFO L231 Difference]: Finished difference. Result has 208 places, 270 transitions, 3414 flow [2024-06-14 13:52:40,460 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3070, PETRI_DIFFERENCE_MINUEND_PLACES=201, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=260, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=99, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=161, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3414, PETRI_PLACES=208, PETRI_TRANSITIONS=270} [2024-06-14 13:52:40,460 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-14 13:52:40,460 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 270 transitions, 3414 flow [2024-06-14 13:52:40,461 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:40,461 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:40,461 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:40,461 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-14 13:52:40,461 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)] === [2024-06-14 13:52:40,461 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:40,461 INFO L85 PathProgramCache]: Analyzing trace with hash -97740047, now seen corresponding path program 6 times [2024-06-14 13:52:40,461 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:40,461 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [383023141] [2024-06-14 13:52:40,462 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:40,462 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:40,468 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:40,774 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:40,774 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:40,775 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [383023141] [2024-06-14 13:52:40,775 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [383023141] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:40,775 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:40,775 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:40,775 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1689722003] [2024-06-14 13:52:40,775 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:40,775 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:40,775 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:40,776 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:40,776 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:40,812 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:40,813 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 208 places, 270 transitions, 3414 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:40,813 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:40,813 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:40,813 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:41,217 INFO L124 PetriNetUnfolderBase]: 1671/2814 cut-off events. [2024-06-14 13:52:41,217 INFO L125 PetriNetUnfolderBase]: For 128838/128838 co-relation queries the response was YES. [2024-06-14 13:52:41,236 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18327 conditions, 2814 events. 1671/2814 cut-off events. For 128838/128838 co-relation queries the response was YES. Maximal size of possible extension queue 201. Compared 16505 event pairs, 360 based on Foata normal form. 1/2809 useless extension candidates. Maximal degree in co-relation 18227. Up to 2451 conditions per place. [2024-06-14 13:52:41,245 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 222 selfloop transitions, 61 changer transitions 0/289 dead transitions. [2024-06-14 13:52:41,245 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 289 transitions, 4222 flow [2024-06-14 13:52:41,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:41,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:41,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 13:52:41,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-14 13:52:41,246 INFO L175 Difference]: Start difference. First operand has 208 places, 270 transitions, 3414 flow. Second operand 7 states and 159 transitions. [2024-06-14 13:52:41,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 289 transitions, 4222 flow [2024-06-14 13:52:41,501 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 289 transitions, 4040 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:41,504 INFO L231 Difference]: Finished difference. Result has 212 places, 270 transitions, 3360 flow [2024-06-14 13:52:41,505 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3232, PETRI_DIFFERENCE_MINUEND_PLACES=205, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=209, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3360, PETRI_PLACES=212, PETRI_TRANSITIONS=270} [2024-06-14 13:52:41,505 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-14 13:52:41,505 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 270 transitions, 3360 flow [2024-06-14 13:52:41,506 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:41,506 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:41,506 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:41,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-14 13:52:41,507 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)] === [2024-06-14 13:52:41,507 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:41,507 INFO L85 PathProgramCache]: Analyzing trace with hash -591196947, now seen corresponding path program 2 times [2024-06-14 13:52:41,507 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:41,507 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1379783081] [2024-06-14 13:52:41,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:41,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:41,515 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:41,829 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:41,829 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:41,829 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1379783081] [2024-06-14 13:52:41,829 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1379783081] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:41,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:41,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:41,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [816554748] [2024-06-14 13:52:41,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:41,830 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:41,830 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:41,830 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:41,830 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:41,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:41,868 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 212 places, 270 transitions, 3360 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:41,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:41,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:41,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:42,330 INFO L124 PetriNetUnfolderBase]: 1676/2825 cut-off events. [2024-06-14 13:52:42,330 INFO L125 PetriNetUnfolderBase]: For 133531/133531 co-relation queries the response was YES. [2024-06-14 13:52:42,349 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18329 conditions, 2825 events. 1676/2825 cut-off events. For 133531/133531 co-relation queries the response was YES. Maximal size of possible extension queue 203. Compared 16615 event pairs, 358 based on Foata normal form. 1/2820 useless extension candidates. Maximal degree in co-relation 18228. Up to 2460 conditions per place. [2024-06-14 13:52:42,357 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 226 selfloop transitions, 61 changer transitions 0/293 dead transitions. [2024-06-14 13:52:42,357 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 293 transitions, 4230 flow [2024-06-14 13:52:42,358 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:52:42,358 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:52:42,358 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 13:52:42,358 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:52:42,358 INFO L175 Difference]: Start difference. First operand has 212 places, 270 transitions, 3360 flow. Second operand 8 states and 176 transitions. [2024-06-14 13:52:42,358 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 293 transitions, 4230 flow [2024-06-14 13:52:42,668 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 293 transitions, 4098 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:42,671 INFO L231 Difference]: Finished difference. Result has 216 places, 273 transitions, 3404 flow [2024-06-14 13:52:42,671 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3234, PETRI_DIFFERENCE_MINUEND_PLACES=208, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=270, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=212, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=3404, PETRI_PLACES=216, PETRI_TRANSITIONS=273} [2024-06-14 13:52:42,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-14 13:52:42,672 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 273 transitions, 3404 flow [2024-06-14 13:52:42,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:42,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:42,672 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:42,672 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-14 13:52:42,672 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)] === [2024-06-14 13:52:42,672 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:42,672 INFO L85 PathProgramCache]: Analyzing trace with hash -1848278465, now seen corresponding path program 1 times [2024-06-14 13:52:42,672 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:42,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1350841332] [2024-06-14 13:52:42,673 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:42,673 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:42,679 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:43,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:43,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:43,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1350841332] [2024-06-14 13:52:43,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1350841332] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:43,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:43,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:43,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1202553008] [2024-06-14 13:52:43,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:43,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:43,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:43,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:43,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:43,067 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:43,067 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 216 places, 273 transitions, 3404 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) [2024-06-14 13:52:43,067 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:43,068 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:43,068 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:43,494 INFO L124 PetriNetUnfolderBase]: 1671/2824 cut-off events. [2024-06-14 13:52:43,494 INFO L125 PetriNetUnfolderBase]: For 153823/153823 co-relation queries the response was YES. [2024-06-14 13:52:43,512 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18443 conditions, 2824 events. 1671/2824 cut-off events. For 153823/153823 co-relation queries the response was YES. Maximal size of possible extension queue 206. Compared 16735 event pairs, 367 based on Foata normal form. 12/2816 useless extension candidates. Maximal degree in co-relation 18341. Up to 2284 conditions per place. [2024-06-14 13:52:43,522 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 97 changer transitions 0/298 dead transitions. [2024-06-14 13:52:43,523 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 298 transitions, 4246 flow [2024-06-14 13:52:43,523 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:43,523 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:43,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 13:52:43,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:52:43,523 INFO L175 Difference]: Start difference. First operand has 216 places, 273 transitions, 3404 flow. Second operand 7 states and 168 transitions. [2024-06-14 13:52:43,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 298 transitions, 4246 flow [2024-06-14 13:52:43,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 298 transitions, 4112 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:43,869 INFO L231 Difference]: Finished difference. Result has 218 places, 275 transitions, 3507 flow [2024-06-14 13:52:43,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3270, PETRI_DIFFERENCE_MINUEND_PLACES=211, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=273, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=95, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=176, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3507, PETRI_PLACES=218, PETRI_TRANSITIONS=275} [2024-06-14 13:52:43,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-14 13:52:43,870 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 275 transitions, 3507 flow [2024-06-14 13:52:43,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:43,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:43,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:43,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-14 13:52:43,870 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)] === [2024-06-14 13:52:43,871 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:43,871 INFO L85 PathProgramCache]: Analyzing trace with hash 205879121, now seen corresponding path program 4 times [2024-06-14 13:52:43,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:43,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [682508237] [2024-06-14 13:52:43,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:43,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:43,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:44,223 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:44,224 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:44,224 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [682508237] [2024-06-14 13:52:44,224 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [682508237] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:44,224 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:44,224 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:44,224 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [561735276] [2024-06-14 13:52:44,224 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:44,224 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:44,224 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:44,225 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:44,225 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:44,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:44,266 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 218 places, 275 transitions, 3507 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:44,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:44,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:44,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:44,688 INFO L124 PetriNetUnfolderBase]: 1743/2933 cut-off events. [2024-06-14 13:52:44,688 INFO L125 PetriNetUnfolderBase]: For 153954/153954 co-relation queries the response was YES. [2024-06-14 13:52:44,706 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19115 conditions, 2933 events. 1743/2933 cut-off events. For 153954/153954 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17315 event pairs, 272 based on Foata normal form. 10/2942 useless extension candidates. Maximal degree in co-relation 19012. Up to 2586 conditions per place. [2024-06-14 13:52:44,715 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 31 changer transitions 0/305 dead transitions. [2024-06-14 13:52:44,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 305 transitions, 4207 flow [2024-06-14 13:52:44,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:44,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:44,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-14 13:52:44,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-14 13:52:44,716 INFO L175 Difference]: Start difference. First operand has 218 places, 275 transitions, 3507 flow. Second operand 6 states and 150 transitions. [2024-06-14 13:52:44,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 305 transitions, 4207 flow [2024-06-14 13:52:45,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 305 transitions, 4006 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:45,095 INFO L231 Difference]: Finished difference. Result has 219 places, 276 transitions, 3391 flow [2024-06-14 13:52:45,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3306, PETRI_DIFFERENCE_MINUEND_PLACES=213, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=275, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=30, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3391, PETRI_PLACES=219, PETRI_TRANSITIONS=276} [2024-06-14 13:52:45,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-14 13:52:45,095 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 276 transitions, 3391 flow [2024-06-14 13:52:45,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:45,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:45,096 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:45,096 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-14 13:52:45,096 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)] === [2024-06-14 13:52:45,096 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:45,096 INFO L85 PathProgramCache]: Analyzing trace with hash 719598809, now seen corresponding path program 3 times [2024-06-14 13:52:45,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:45,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [767033418] [2024-06-14 13:52:45,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:45,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:45,103 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:45,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:45,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:45,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [767033418] [2024-06-14 13:52:45,413 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [767033418] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:45,413 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:45,413 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:45,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [630393564] [2024-06-14 13:52:45,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:45,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:45,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:45,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:45,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:45,452 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:45,452 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 219 places, 276 transitions, 3391 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:45,452 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:45,452 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:45,452 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:45,889 INFO L124 PetriNetUnfolderBase]: 1740/2935 cut-off events. [2024-06-14 13:52:45,889 INFO L125 PetriNetUnfolderBase]: For 147379/147393 co-relation queries the response was YES. [2024-06-14 13:52:45,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 18933 conditions, 2935 events. 1740/2935 cut-off events. For 147379/147393 co-relation queries the response was YES. Maximal size of possible extension queue 209. Compared 17430 event pairs, 381 based on Foata normal form. 11/2940 useless extension candidates. Maximal degree in co-relation 18829. Up to 2562 conditions per place. [2024-06-14 13:52:45,927 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 228 selfloop transitions, 56 changer transitions 0/290 dead transitions. [2024-06-14 13:52:45,927 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 290 transitions, 4099 flow [2024-06-14 13:52:45,928 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:45,928 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:45,928 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 13:52:45,929 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 13:52:45,929 INFO L175 Difference]: Start difference. First operand has 219 places, 276 transitions, 3391 flow. Second operand 6 states and 136 transitions. [2024-06-14 13:52:45,929 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 290 transitions, 4099 flow [2024-06-14 13:52:46,247 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 290 transitions, 4036 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:46,250 INFO L231 Difference]: Finished difference. Result has 221 places, 276 transitions, 3446 flow [2024-06-14 13:52:46,251 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3328, PETRI_DIFFERENCE_MINUEND_PLACES=215, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=56, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=220, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3446, PETRI_PLACES=221, PETRI_TRANSITIONS=276} [2024-06-14 13:52:46,251 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-14 13:52:46,251 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 276 transitions, 3446 flow [2024-06-14 13:52:46,251 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:46,251 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:46,251 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:46,251 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-14 13:52:46,251 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)] === [2024-06-14 13:52:46,252 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:46,252 INFO L85 PathProgramCache]: Analyzing trace with hash 601854047, now seen corresponding path program 7 times [2024-06-14 13:52:46,252 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:46,252 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1168055742] [2024-06-14 13:52:46,252 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:46,252 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:46,260 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:46,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:46,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:46,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1168055742] [2024-06-14 13:52:46,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1168055742] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:46,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:46,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:46,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1131461877] [2024-06-14 13:52:46,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:46,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:46,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:46,593 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:46,593 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:46,647 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:46,648 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 221 places, 276 transitions, 3446 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:46,648 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:46,648 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:46,648 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:47,046 INFO L124 PetriNetUnfolderBase]: 1742/2926 cut-off events. [2024-06-14 13:52:47,046 INFO L125 PetriNetUnfolderBase]: For 150554/150554 co-relation queries the response was YES. [2024-06-14 13:52:47,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19046 conditions, 2926 events. 1742/2926 cut-off events. For 150554/150554 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17318 event pairs, 368 based on Foata normal form. 2/2922 useless extension candidates. Maximal degree in co-relation 18941. Up to 2420 conditions per place. [2024-06-14 13:52:47,074 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 195 selfloop transitions, 107 changer transitions 0/308 dead transitions. [2024-06-14 13:52:47,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 308 transitions, 4482 flow [2024-06-14 13:52:47,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:47,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:47,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-14 13:52:47,075 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-14 13:52:47,075 INFO L175 Difference]: Start difference. First operand has 221 places, 276 transitions, 3446 flow. Second operand 7 states and 173 transitions. [2024-06-14 13:52:47,075 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 308 transitions, 4482 flow [2024-06-14 13:52:47,388 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 308 transitions, 4348 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:47,392 INFO L231 Difference]: Finished difference. Result has 225 places, 279 transitions, 3605 flow [2024-06-14 13:52:47,392 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3312, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=276, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=3605, PETRI_PLACES=225, PETRI_TRANSITIONS=279} [2024-06-14 13:52:47,392 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-14 13:52:47,393 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 279 transitions, 3605 flow [2024-06-14 13:52:47,393 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:47,393 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:47,393 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:47,393 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-14 13:52:47,393 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)] === [2024-06-14 13:52:47,393 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:47,393 INFO L85 PathProgramCache]: Analyzing trace with hash 780810667, now seen corresponding path program 8 times [2024-06-14 13:52:47,393 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:47,394 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936908599] [2024-06-14 13:52:47,394 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:47,394 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:47,401 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:47,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:47,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:47,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936908599] [2024-06-14 13:52:47,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936908599] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:47,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:47,753 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:47,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2133484883] [2024-06-14 13:52:47,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:47,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:47,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:47,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:47,755 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:47,797 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:47,798 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 225 places, 279 transitions, 3605 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:47,798 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:47,798 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:47,798 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:48,342 INFO L124 PetriNetUnfolderBase]: 1736/2918 cut-off events. [2024-06-14 13:52:48,342 INFO L125 PetriNetUnfolderBase]: For 153514/153514 co-relation queries the response was YES. [2024-06-14 13:52:48,361 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19196 conditions, 2918 events. 1736/2918 cut-off events. For 153514/153514 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17245 event pairs, 368 based on Foata normal form. 2/2914 useless extension candidates. Maximal degree in co-relation 19089. Up to 2415 conditions per place. [2024-06-14 13:52:48,371 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 194 selfloop transitions, 110 changer transitions 0/310 dead transitions. [2024-06-14 13:52:48,372 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 310 transitions, 4619 flow [2024-06-14 13:52:48,372 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:52:48,372 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:52:48,372 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 13:52:48,373 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-14 13:52:48,373 INFO L175 Difference]: Start difference. First operand has 225 places, 279 transitions, 3605 flow. Second operand 9 states and 211 transitions. [2024-06-14 13:52:48,373 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 310 transitions, 4619 flow [2024-06-14 13:52:48,717 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 310 transitions, 4370 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-14 13:52:48,721 INFO L231 Difference]: Finished difference. Result has 228 places, 279 transitions, 3607 flow [2024-06-14 13:52:48,722 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3368, PETRI_DIFFERENCE_MINUEND_PLACES=219, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=110, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=169, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=3607, PETRI_PLACES=228, PETRI_TRANSITIONS=279} [2024-06-14 13:52:48,722 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-14 13:52:48,722 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 279 transitions, 3607 flow [2024-06-14 13:52:48,722 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:48,723 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:48,723 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:48,723 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-14 13:52:48,723 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)] === [2024-06-14 13:52:48,723 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:48,723 INFO L85 PathProgramCache]: Analyzing trace with hash -1957102167, now seen corresponding path program 4 times [2024-06-14 13:52:48,724 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:48,724 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1674371881] [2024-06-14 13:52:48,724 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:48,724 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:48,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:49,110 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:49,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:49,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1674371881] [2024-06-14 13:52:49,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1674371881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:49,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:49,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:49,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1258957198] [2024-06-14 13:52:49,111 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:49,111 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:49,111 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:49,111 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:49,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:49,145 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:49,145 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 228 places, 279 transitions, 3607 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:49,145 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:49,145 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:49,145 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:49,536 INFO L124 PetriNetUnfolderBase]: 1733/2917 cut-off events. [2024-06-14 13:52:49,536 INFO L125 PetriNetUnfolderBase]: For 145370/145370 co-relation queries the response was YES. [2024-06-14 13:52:49,554 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19065 conditions, 2917 events. 1733/2917 cut-off events. For 145370/145370 co-relation queries the response was YES. Maximal size of possible extension queue 211. Compared 17288 event pairs, 365 based on Foata normal form. 1/2912 useless extension candidates. Maximal degree in co-relation 18958. Up to 2554 conditions per place. [2024-06-14 13:52:49,563 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 229 selfloop transitions, 60 changer transitions 0/295 dead transitions. [2024-06-14 13:52:49,564 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 295 transitions, 4225 flow [2024-06-14 13:52:49,564 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:49,564 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:49,564 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-14 13:52:49,565 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 13:52:49,565 INFO L175 Difference]: Start difference. First operand has 228 places, 279 transitions, 3607 flow. Second operand 6 states and 140 transitions. [2024-06-14 13:52:49,565 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 295 transitions, 4225 flow [2024-06-14 13:52:49,979 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 295 transitions, 3968 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-14 13:52:49,983 INFO L231 Difference]: Finished difference. Result has 223 places, 279 transitions, 3484 flow [2024-06-14 13:52:49,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3350, PETRI_DIFFERENCE_MINUEND_PLACES=217, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=219, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=3484, PETRI_PLACES=223, PETRI_TRANSITIONS=279} [2024-06-14 13:52:49,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-14 13:52:49,984 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 279 transitions, 3484 flow [2024-06-14 13:52:49,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:49,984 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:49,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:49,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-14 13:52:49,985 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)] === [2024-06-14 13:52:49,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:49,985 INFO L85 PathProgramCache]: Analyzing trace with hash -1418413869, now seen corresponding path program 9 times [2024-06-14 13:52:49,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:49,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [707943355] [2024-06-14 13:52:49,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:49,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:49,994 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:50,315 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:50,315 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:50,315 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [707943355] [2024-06-14 13:52:50,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [707943355] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:50,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:50,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:50,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [328881901] [2024-06-14 13:52:50,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:50,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:50,316 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:50,316 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:50,316 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:50,361 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:50,362 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 223 places, 279 transitions, 3484 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:50,362 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:50,362 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:50,362 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:50,808 INFO L124 PetriNetUnfolderBase]: 1809/3056 cut-off events. [2024-06-14 13:52:50,808 INFO L125 PetriNetUnfolderBase]: For 141046/141049 co-relation queries the response was YES. [2024-06-14 13:52:50,830 INFO L83 FinitePrefix]: Finished finitePrefix Result has 19597 conditions, 3056 events. 1809/3056 cut-off events. For 141046/141049 co-relation queries the response was YES. Maximal size of possible extension queue 220. Compared 18297 event pairs, 355 based on Foata normal form. 6/3060 useless extension candidates. Maximal degree in co-relation 19492. Up to 2610 conditions per place. [2024-06-14 13:52:50,842 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 255 selfloop transitions, 75 changer transitions 0/336 dead transitions. [2024-06-14 13:52:50,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 336 transitions, 4752 flow [2024-06-14 13:52:50,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:50,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:50,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-14 13:52:50,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-14 13:52:50,843 INFO L175 Difference]: Start difference. First operand has 223 places, 279 transitions, 3484 flow. Second operand 6 states and 156 transitions. [2024-06-14 13:52:50,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 336 transitions, 4752 flow [2024-06-14 13:52:51,197 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 336 transitions, 4606 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 13:52:51,201 INFO L231 Difference]: Finished difference. Result has 224 places, 307 transitions, 4011 flow [2024-06-14 13:52:51,201 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3352, PETRI_DIFFERENCE_MINUEND_PLACES=216, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=279, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=50, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=207, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4011, PETRI_PLACES=224, PETRI_TRANSITIONS=307} [2024-06-14 13:52:51,201 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-14 13:52:51,202 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 307 transitions, 4011 flow [2024-06-14 13:52:51,202 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:51,202 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:51,202 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:51,202 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-14 13:52:51,202 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)] === [2024-06-14 13:52:51,202 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:51,202 INFO L85 PathProgramCache]: Analyzing trace with hash 205882097, now seen corresponding path program 10 times [2024-06-14 13:52:51,202 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:51,202 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624812654] [2024-06-14 13:52:51,202 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:51,202 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:51,210 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:51,509 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:51,509 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:51,509 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624812654] [2024-06-14 13:52:51,509 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624812654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:51,509 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:51,509 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:51,510 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [28363329] [2024-06-14 13:52:51,510 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:51,510 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:51,510 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:51,510 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:51,510 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:51,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:51,565 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 224 places, 307 transitions, 4011 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:51,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:51,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:51,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:52,044 INFO L124 PetriNetUnfolderBase]: 1843/3111 cut-off events. [2024-06-14 13:52:52,044 INFO L125 PetriNetUnfolderBase]: For 140617/140623 co-relation queries the response was YES. [2024-06-14 13:52:52,065 INFO L83 FinitePrefix]: Finished finitePrefix Result has 20698 conditions, 3111 events. 1843/3111 cut-off events. For 140617/140623 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 18660 event pairs, 355 based on Foata normal form. 6/3115 useless extension candidates. Maximal degree in co-relation 20592. Up to 2548 conditions per place. [2024-06-14 13:52:52,076 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 123 changer transitions 0/353 dead transitions. [2024-06-14 13:52:52,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 353 transitions, 5203 flow [2024-06-14 13:52:52,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:52,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:52,077 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-14 13:52:52,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-14 13:52:52,077 INFO L175 Difference]: Start difference. First operand has 224 places, 307 transitions, 4011 flow. Second operand 7 states and 179 transitions. [2024-06-14 13:52:52,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 353 transitions, 5203 flow [2024-06-14 13:52:52,434 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 353 transitions, 5127 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:52,438 INFO L231 Difference]: Finished difference. Result has 230 places, 322 transitions, 4494 flow [2024-06-14 13:52:52,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=3935, PETRI_DIFFERENCE_MINUEND_PLACES=222, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=307, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=111, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=189, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4494, PETRI_PLACES=230, PETRI_TRANSITIONS=322} [2024-06-14 13:52:52,438 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-14 13:52:52,439 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 322 transitions, 4494 flow [2024-06-14 13:52:52,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:52,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:52,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:52,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-14 13:52:52,439 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)] === [2024-06-14 13:52:52,439 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:52,439 INFO L85 PathProgramCache]: Analyzing trace with hash -742217203, now seen corresponding path program 11 times [2024-06-14 13:52:52,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:52,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1100248371] [2024-06-14 13:52:52,440 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:52,440 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:52,447 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:52,777 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:52,777 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:52,777 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1100248371] [2024-06-14 13:52:52,777 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1100248371] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:52,777 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:52,777 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:52,777 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [719074811] [2024-06-14 13:52:52,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:52,778 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:52,778 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:52,780 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:52,780 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:52,817 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:52,818 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 230 places, 322 transitions, 4494 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:52,818 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:52,818 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:52,818 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:53,311 INFO L124 PetriNetUnfolderBase]: 1837/3103 cut-off events. [2024-06-14 13:52:53,311 INFO L125 PetriNetUnfolderBase]: For 145881/145887 co-relation queries the response was YES. [2024-06-14 13:52:53,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21488 conditions, 3103 events. 1837/3103 cut-off events. For 145881/145887 co-relation queries the response was YES. Maximal size of possible extension queue 225. Compared 18601 event pairs, 355 based on Foata normal form. 6/3107 useless extension candidates. Maximal degree in co-relation 21380. Up to 2685 conditions per place. [2024-06-14 13:52:53,341 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 69 changer transitions 0/348 dead transitions. [2024-06-14 13:52:53,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 348 transitions, 5244 flow [2024-06-14 13:52:53,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:53,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:53,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:52:53,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 13:52:53,343 INFO L175 Difference]: Start difference. First operand has 230 places, 322 transitions, 4494 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:52:53,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 348 transitions, 5244 flow [2024-06-14 13:52:53,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 348 transitions, 5110 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-14 13:52:53,677 INFO L231 Difference]: Finished difference. Result has 234 places, 322 transitions, 4512 flow [2024-06-14 13:52:53,677 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4360, PETRI_DIFFERENCE_MINUEND_PLACES=227, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=69, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=253, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4512, PETRI_PLACES=234, PETRI_TRANSITIONS=322} [2024-06-14 13:52:53,678 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-14 13:52:53,678 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 322 transitions, 4512 flow [2024-06-14 13:52:53,678 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:53,678 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:53,678 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:53,678 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-14 13:52:53,678 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)] === [2024-06-14 13:52:53,679 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:53,679 INFO L85 PathProgramCache]: Analyzing trace with hash 605745827, now seen corresponding path program 2 times [2024-06-14 13:52:53,679 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:53,679 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1406224256] [2024-06-14 13:52:53,679 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:53,679 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:53,686 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:54,016 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:54,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:54,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1406224256] [2024-06-14 13:52:54,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1406224256] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:54,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:54,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:54,017 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [494872413] [2024-06-14 13:52:54,017 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:54,017 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:54,017 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:54,017 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:54,017 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:54,055 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:54,055 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 234 places, 322 transitions, 4512 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) [2024-06-14 13:52:54,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:54,056 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:54,056 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:54,505 INFO L124 PetriNetUnfolderBase]: 1826/3100 cut-off events. [2024-06-14 13:52:54,505 INFO L125 PetriNetUnfolderBase]: For 163531/163531 co-relation queries the response was YES. [2024-06-14 13:52:54,527 INFO L83 FinitePrefix]: Finished finitePrefix Result has 21649 conditions, 3100 events. 1826/3100 cut-off events. For 163531/163531 co-relation queries the response was YES. Maximal size of possible extension queue 229. Compared 18822 event pairs, 347 based on Foata normal form. 14/3098 useless extension candidates. Maximal degree in co-relation 21540. Up to 2575 conditions per place. [2024-06-14 13:52:54,538 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 257 selfloop transitions, 62 changer transitions 0/351 dead transitions. [2024-06-14 13:52:54,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 351 transitions, 5290 flow [2024-06-14 13:52:54,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:54,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:54,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 13:52:54,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-14 13:52:54,539 INFO L175 Difference]: Start difference. First operand has 234 places, 322 transitions, 4512 flow. Second operand 6 states and 155 transitions. [2024-06-14 13:52:54,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 351 transitions, 5290 flow [2024-06-14 13:52:54,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 351 transitions, 5011 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 13:52:54,788 INFO L231 Difference]: Finished difference. Result has 232 places, 325 transitions, 4426 flow [2024-06-14 13:52:54,788 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4233, PETRI_DIFFERENCE_MINUEND_PLACES=226, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=322, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=59, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=260, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4426, PETRI_PLACES=232, PETRI_TRANSITIONS=325} [2024-06-14 13:52:54,789 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-14 13:52:54,789 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 325 transitions, 4426 flow [2024-06-14 13:52:54,789 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) [2024-06-14 13:52:54,789 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:54,789 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:54,789 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-14 13:52:54,789 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)] === [2024-06-14 13:52:54,790 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:54,790 INFO L85 PathProgramCache]: Analyzing trace with hash 205059225, now seen corresponding path program 3 times [2024-06-14 13:52:54,790 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:54,790 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [876412035] [2024-06-14 13:52:54,790 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:54,790 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:54,798 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:55,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:55,141 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:55,141 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [876412035] [2024-06-14 13:52:55,141 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [876412035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:55,141 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:55,141 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:55,141 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1684521681] [2024-06-14 13:52:55,141 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:55,142 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:55,142 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:55,142 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:55,142 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:55,194 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:55,194 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 232 places, 325 transitions, 4426 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) [2024-06-14 13:52:55,194 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:55,194 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:55,194 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:55,670 INFO L124 PetriNetUnfolderBase]: 1866/3169 cut-off events. [2024-06-14 13:52:55,670 INFO L125 PetriNetUnfolderBase]: For 166492/166492 co-relation queries the response was YES. [2024-06-14 13:52:55,692 INFO L83 FinitePrefix]: Finished finitePrefix Result has 22174 conditions, 3169 events. 1866/3169 cut-off events. For 166492/166492 co-relation queries the response was YES. Maximal size of possible extension queue 232. Compared 19291 event pairs, 358 based on Foata normal form. 12/3165 useless extension candidates. Maximal degree in co-relation 22065. Up to 2638 conditions per place. [2024-06-14 13:52:55,703 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 248 selfloop transitions, 73 changer transitions 0/353 dead transitions. [2024-06-14 13:52:55,703 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 353 transitions, 5412 flow [2024-06-14 13:52:55,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:52:55,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:52:55,704 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:52:55,704 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 13:52:55,704 INFO L175 Difference]: Start difference. First operand has 232 places, 325 transitions, 4426 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:52:55,704 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 353 transitions, 5412 flow [2024-06-14 13:52:56,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 353 transitions, 5283 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-14 13:52:56,102 INFO L231 Difference]: Finished difference. Result has 235 places, 327 transitions, 4498 flow [2024-06-14 13:52:56,102 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4297, PETRI_DIFFERENCE_MINUEND_PLACES=228, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=325, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=252, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=4498, PETRI_PLACES=235, PETRI_TRANSITIONS=327} [2024-06-14 13:52:56,102 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-14 13:52:56,103 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 327 transitions, 4498 flow [2024-06-14 13:52:56,103 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) [2024-06-14 13:52:56,103 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:56,103 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:56,103 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-14 13:52:56,103 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)] === [2024-06-14 13:52:56,103 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:56,103 INFO L85 PathProgramCache]: Analyzing trace with hash 620030627, now seen corresponding path program 4 times [2024-06-14 13:52:56,103 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:56,103 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1099017603] [2024-06-14 13:52:56,103 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:56,103 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:56,110 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:56,454 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:56,454 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:56,454 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1099017603] [2024-06-14 13:52:56,454 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1099017603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:56,454 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:56,454 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:56,454 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1256689453] [2024-06-14 13:52:56,454 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:56,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:56,455 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:56,455 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:56,455 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:56,504 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-14 13:52:56,504 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 235 places, 327 transitions, 4498 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) [2024-06-14 13:52:56,505 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:56,505 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-14 13:52:56,505 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:57,023 INFO L124 PetriNetUnfolderBase]: 2023/3412 cut-off events. [2024-06-14 13:52:57,024 INFO L125 PetriNetUnfolderBase]: For 199650/199650 co-relation queries the response was YES. [2024-06-14 13:52:57,049 INFO L83 FinitePrefix]: Finished finitePrefix Result has 24569 conditions, 3412 events. 2023/3412 cut-off events. For 199650/199650 co-relation queries the response was YES. Maximal size of possible extension queue 237. Compared 20863 event pairs, 304 based on Foata normal form. 14/3410 useless extension candidates. Maximal degree in co-relation 24459. Up to 2583 conditions per place. [2024-06-14 13:52:57,061 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 64 changer transitions 0/364 dead transitions. [2024-06-14 13:52:57,061 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 364 transitions, 5498 flow [2024-06-14 13:52:57,062 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:57,062 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:57,062 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-14 13:52:57,062 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-14 13:52:57,062 INFO L175 Difference]: Start difference. First operand has 235 places, 327 transitions, 4498 flow. Second operand 6 states and 160 transitions. [2024-06-14 13:52:57,063 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 364 transitions, 5498 flow [2024-06-14 13:52:57,481 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 364 transitions, 5335 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:52:57,486 INFO L231 Difference]: Finished difference. Result has 237 places, 333 transitions, 4611 flow [2024-06-14 13:52:57,486 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4335, PETRI_DIFFERENCE_MINUEND_PLACES=230, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=327, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=60, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=265, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4611, PETRI_PLACES=237, PETRI_TRANSITIONS=333} [2024-06-14 13:52:57,486 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-14 13:52:57,486 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 333 transitions, 4611 flow [2024-06-14 13:52:57,486 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) [2024-06-14 13:52:57,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:57,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:57,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-14 13:52:57,487 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)] === [2024-06-14 13:52:57,487 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:57,487 INFO L85 PathProgramCache]: Analyzing trace with hash 144763211, now seen corresponding path program 1 times [2024-06-14 13:52:57,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:57,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1382928055] [2024-06-14 13:52:57,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:57,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:57,494 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:57,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:57,807 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:57,807 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1382928055] [2024-06-14 13:52:57,807 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1382928055] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:57,807 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:57,807 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:57,807 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [463540387] [2024-06-14 13:52:57,807 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:57,807 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:57,808 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:57,808 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:57,808 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:57,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:57,872 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 237 places, 333 transitions, 4611 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:57,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:57,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:57,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:58,400 INFO L124 PetriNetUnfolderBase]: 2119/3542 cut-off events. [2024-06-14 13:52:58,400 INFO L125 PetriNetUnfolderBase]: For 199487/199504 co-relation queries the response was YES. [2024-06-14 13:52:58,423 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25888 conditions, 3542 events. 2119/3542 cut-off events. For 199487/199504 co-relation queries the response was YES. Maximal size of possible extension queue 242. Compared 21487 event pairs, 384 based on Foata normal form. 16/3552 useless extension candidates. Maximal degree in co-relation 25776. Up to 3027 conditions per place. [2024-06-14 13:52:58,435 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 284 selfloop transitions, 70 changer transitions 0/360 dead transitions. [2024-06-14 13:52:58,435 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 360 transitions, 5608 flow [2024-06-14 13:52:58,435 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:58,435 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:58,436 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-14 13:52:58,436 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 13:52:58,436 INFO L175 Difference]: Start difference. First operand has 237 places, 333 transitions, 4611 flow. Second operand 6 states and 141 transitions. [2024-06-14 13:52:58,436 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 360 transitions, 5608 flow [2024-06-14 13:52:58,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 360 transitions, 5521 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-14 13:52:58,840 INFO L231 Difference]: Finished difference. Result has 242 places, 341 transitions, 4830 flow [2024-06-14 13:52:58,841 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4526, PETRI_DIFFERENCE_MINUEND_PLACES=235, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=333, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=65, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=266, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4830, PETRI_PLACES=242, PETRI_TRANSITIONS=341} [2024-06-14 13:52:58,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-14 13:52:58,841 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 341 transitions, 4830 flow [2024-06-14 13:52:58,841 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:58,841 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:52:58,841 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:52:58,841 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-14 13:52:58,842 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)] === [2024-06-14 13:52:58,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:52:58,842 INFO L85 PathProgramCache]: Analyzing trace with hash 408908555, now seen corresponding path program 2 times [2024-06-14 13:52:58,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:52:58,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1227647492] [2024-06-14 13:52:58,842 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:52:58,842 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:52:58,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:52:59,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:52:59,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:52:59,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1227647492] [2024-06-14 13:52:59,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1227647492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:52:59,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:52:59,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:52:59,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [632819542] [2024-06-14 13:52:59,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:52:59,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:52:59,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:52:59,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:52:59,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:52:59,271 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:52:59,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 242 places, 341 transitions, 4830 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:52:59,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:52:59,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:52:59,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:52:59,808 INFO L124 PetriNetUnfolderBase]: 2122/3559 cut-off events. [2024-06-14 13:52:59,808 INFO L125 PetriNetUnfolderBase]: For 203166/203183 co-relation queries the response was YES. [2024-06-14 13:52:59,833 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26180 conditions, 3559 events. 2122/3559 cut-off events. For 203166/203183 co-relation queries the response was YES. Maximal size of possible extension queue 243. Compared 21723 event pairs, 443 based on Foata normal form. 16/3569 useless extension candidates. Maximal degree in co-relation 26065. Up to 3121 conditions per place. [2024-06-14 13:52:59,845 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 288 selfloop transitions, 63 changer transitions 0/357 dead transitions. [2024-06-14 13:52:59,846 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 357 transitions, 5608 flow [2024-06-14 13:52:59,846 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:52:59,846 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:52:59,846 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-14 13:52:59,846 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 13:52:59,846 INFO L175 Difference]: Start difference. First operand has 242 places, 341 transitions, 4830 flow. Second operand 6 states and 136 transitions. [2024-06-14 13:52:59,847 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 357 transitions, 5608 flow [2024-06-14 13:53:00,228 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 357 transitions, 5452 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:00,232 INFO L231 Difference]: Finished difference. Result has 246 places, 343 transitions, 4852 flow [2024-06-14 13:53:00,233 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4688, PETRI_DIFFERENCE_MINUEND_PLACES=240, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=341, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=61, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4852, PETRI_PLACES=246, PETRI_TRANSITIONS=343} [2024-06-14 13:53:00,233 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-14 13:53:00,233 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 343 transitions, 4852 flow [2024-06-14 13:53:00,233 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:00,233 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:00,233 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:00,233 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-14 13:53:00,233 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)] === [2024-06-14 13:53:00,234 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:00,234 INFO L85 PathProgramCache]: Analyzing trace with hash -1418167605, now seen corresponding path program 3 times [2024-06-14 13:53:00,234 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:00,234 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2124321018] [2024-06-14 13:53:00,234 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:00,234 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:00,241 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:00,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:00,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:00,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2124321018] [2024-06-14 13:53:00,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2124321018] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:00,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:00,581 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:00,581 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1013555029] [2024-06-14 13:53:00,581 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:00,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:00,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:00,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:00,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:00,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:00,649 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 246 places, 343 transitions, 4852 flow. Second operand has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:00,649 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:00,649 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:00,649 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:01,236 INFO L124 PetriNetUnfolderBase]: 2136/3578 cut-off events. [2024-06-14 13:53:01,237 INFO L125 PetriNetUnfolderBase]: For 219506/219512 co-relation queries the response was YES. [2024-06-14 13:53:01,264 INFO L83 FinitePrefix]: Finished finitePrefix Result has 25920 conditions, 3578 events. 2136/3578 cut-off events. For 219506/219512 co-relation queries the response was YES. Maximal size of possible extension queue 245. Compared 21798 event pairs, 349 based on Foata normal form. 24/3600 useless extension candidates. Maximal degree in co-relation 25803. Up to 3042 conditions per place. [2024-06-14 13:53:01,277 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 300 selfloop transitions, 65 changer transitions 0/371 dead transitions. [2024-06-14 13:53:01,277 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 371 transitions, 5711 flow [2024-06-14 13:53:01,277 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:01,277 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:01,278 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-14 13:53:01,278 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-14 13:53:01,278 INFO L175 Difference]: Start difference. First operand has 246 places, 343 transitions, 4852 flow. Second operand 6 states and 152 transitions. [2024-06-14 13:53:01,278 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 371 transitions, 5711 flow [2024-06-14 13:53:01,959 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 371 transitions, 5563 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:01,963 INFO L231 Difference]: Finished difference. Result has 248 places, 345 transitions, 4895 flow [2024-06-14 13:53:01,964 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4704, PETRI_DIFFERENCE_MINUEND_PLACES=242, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=343, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=63, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=4895, PETRI_PLACES=248, PETRI_TRANSITIONS=345} [2024-06-14 13:53:01,964 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-14 13:53:01,964 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 345 transitions, 4895 flow [2024-06-14 13:53:01,964 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.285714285714286) internal successors, (107), 7 states have internal predecessors, (107), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:01,965 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:01,965 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:01,965 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-14 13:53:01,965 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)] === [2024-06-14 13:53:01,965 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:01,965 INFO L85 PathProgramCache]: Analyzing trace with hash -371501503, now seen corresponding path program 1 times [2024-06-14 13:53:01,966 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:01,966 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1930811836] [2024-06-14 13:53:01,966 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:01,966 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:01,975 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:02,328 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:02,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:02,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1930811836] [2024-06-14 13:53:02,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1930811836] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:02,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:02,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:02,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [695117863] [2024-06-14 13:53:02,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:02,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:02,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:02,329 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:02,329 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:02,389 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:02,389 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 248 places, 345 transitions, 4895 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:02,389 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:02,389 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:02,389 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:02,972 INFO L124 PetriNetUnfolderBase]: 2189/3662 cut-off events. [2024-06-14 13:53:02,973 INFO L125 PetriNetUnfolderBase]: For 213385/213385 co-relation queries the response was YES. [2024-06-14 13:53:02,997 INFO L83 FinitePrefix]: Finished finitePrefix Result has 26879 conditions, 3662 events. 2189/3662 cut-off events. For 213385/213385 co-relation queries the response was YES. Maximal size of possible extension queue 249. Compared 22282 event pairs, 357 based on Foata normal form. 6/3667 useless extension candidates. Maximal degree in co-relation 26761. Up to 3116 conditions per place. [2024-06-14 13:53:03,008 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 318 selfloop transitions, 59 changer transitions 0/383 dead transitions. [2024-06-14 13:53:03,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 383 transitions, 5915 flow [2024-06-14 13:53:03,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:03,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:03,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:53:03,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 13:53:03,009 INFO L175 Difference]: Start difference. First operand has 248 places, 345 transitions, 4895 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:53:03,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 383 transitions, 5915 flow [2024-06-14 13:53:03,555 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 383 transitions, 5775 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:03,560 INFO L231 Difference]: Finished difference. Result has 252 places, 347 transitions, 4903 flow [2024-06-14 13:53:03,560 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4755, PETRI_DIFFERENCE_MINUEND_PLACES=244, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=345, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=58, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=287, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4903, PETRI_PLACES=252, PETRI_TRANSITIONS=347} [2024-06-14 13:53:03,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-14 13:53:03,560 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 347 transitions, 4903 flow [2024-06-14 13:53:03,561 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:03,561 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:03,561 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:03,561 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-14 13:53:03,561 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)] === [2024-06-14 13:53:03,562 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:03,562 INFO L85 PathProgramCache]: Analyzing trace with hash -1776753963, now seen corresponding path program 2 times [2024-06-14 13:53:03,562 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:03,562 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1101479676] [2024-06-14 13:53:03,562 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:03,562 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:03,569 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:03,897 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:03,897 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:03,897 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1101479676] [2024-06-14 13:53:03,897 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1101479676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:03,897 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:03,897 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:03,897 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1769970595] [2024-06-14 13:53:03,897 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:03,898 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:03,898 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:03,898 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:03,898 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:03,936 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:03,936 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 252 places, 347 transitions, 4903 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:03,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:03,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:03,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:04,514 INFO L124 PetriNetUnfolderBase]: 2217/3710 cut-off events. [2024-06-14 13:53:04,515 INFO L125 PetriNetUnfolderBase]: For 222927/222927 co-relation queries the response was YES. [2024-06-14 13:53:04,543 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27120 conditions, 3710 events. 2217/3710 cut-off events. For 222927/222927 co-relation queries the response was YES. Maximal size of possible extension queue 255. Compared 22712 event pairs, 439 based on Foata normal form. 8/3717 useless extension candidates. Maximal degree in co-relation 27001. Up to 3318 conditions per place. [2024-06-14 13:53:04,556 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 318 selfloop transitions, 52 changer transitions 0/376 dead transitions. [2024-06-14 13:53:04,557 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 376 transitions, 5753 flow [2024-06-14 13:53:04,557 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:04,557 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:04,557 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 13:53:04,558 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 13:53:04,558 INFO L175 Difference]: Start difference. First operand has 252 places, 347 transitions, 4903 flow. Second operand 8 states and 179 transitions. [2024-06-14 13:53:04,558 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 376 transitions, 5753 flow [2024-06-14 13:53:05,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 376 transitions, 5684 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:05,097 INFO L231 Difference]: Finished difference. Result has 256 places, 348 transitions, 4959 flow [2024-06-14 13:53:05,097 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4834, PETRI_DIFFERENCE_MINUEND_PLACES=248, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=347, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4959, PETRI_PLACES=256, PETRI_TRANSITIONS=348} [2024-06-14 13:53:05,098 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-14 13:53:05,098 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 348 transitions, 4959 flow [2024-06-14 13:53:05,098 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:05,098 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:05,098 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:05,098 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-14 13:53:05,098 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)] === [2024-06-14 13:53:05,098 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:05,098 INFO L85 PathProgramCache]: Analyzing trace with hash -1777080393, now seen corresponding path program 3 times [2024-06-14 13:53:05,098 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:05,099 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417116338] [2024-06-14 13:53:05,099 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:05,099 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:05,105 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:05,427 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:05,427 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:05,427 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417116338] [2024-06-14 13:53:05,427 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417116338] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:05,427 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:05,427 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:05,427 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [429174598] [2024-06-14 13:53:05,427 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:05,427 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:05,428 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:05,428 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:05,428 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:05,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:05,482 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 256 places, 348 transitions, 4959 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:05,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:05,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:05,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:06,076 INFO L124 PetriNetUnfolderBase]: 2237/3742 cut-off events. [2024-06-14 13:53:06,076 INFO L125 PetriNetUnfolderBase]: For 226433/226433 co-relation queries the response was YES. [2024-06-14 13:53:06,105 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27499 conditions, 3742 events. 2237/3742 cut-off events. For 226433/226433 co-relation queries the response was YES. Maximal size of possible extension queue 257. Compared 22914 event pairs, 437 based on Foata normal form. 6/3747 useless extension candidates. Maximal degree in co-relation 27378. Up to 3320 conditions per place. [2024-06-14 13:53:06,120 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 320 selfloop transitions, 54 changer transitions 0/380 dead transitions. [2024-06-14 13:53:06,120 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 380 transitions, 5837 flow [2024-06-14 13:53:06,120 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:06,120 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:06,121 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 13:53:06,121 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 13:53:06,121 INFO L175 Difference]: Start difference. First operand has 256 places, 348 transitions, 4959 flow. Second operand 8 states and 182 transitions. [2024-06-14 13:53:06,121 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 380 transitions, 5837 flow [2024-06-14 13:53:06,792 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 380 transitions, 5730 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:06,797 INFO L231 Difference]: Finished difference. Result has 258 places, 349 transitions, 4982 flow [2024-06-14 13:53:06,797 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4852, PETRI_DIFFERENCE_MINUEND_PLACES=250, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=348, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=53, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=294, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=4982, PETRI_PLACES=258, PETRI_TRANSITIONS=349} [2024-06-14 13:53:06,797 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-14 13:53:06,797 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 349 transitions, 4982 flow [2024-06-14 13:53:06,797 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:06,797 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:06,797 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:06,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-14 13:53:06,798 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)] === [2024-06-14 13:53:06,798 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:06,798 INFO L85 PathProgramCache]: Analyzing trace with hash -538274861, now seen corresponding path program 1 times [2024-06-14 13:53:06,798 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:06,798 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [245759956] [2024-06-14 13:53:06,798 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:06,798 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:06,805 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:07,130 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:07,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:07,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [245759956] [2024-06-14 13:53:07,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [245759956] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:07,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:07,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:07,131 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702245533] [2024-06-14 13:53:07,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:07,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:07,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:07,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:07,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:07,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:07,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 258 places, 349 transitions, 4982 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:07,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:07,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:07,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:08,019 INFO L124 PetriNetUnfolderBase]: 2242/3755 cut-off events. [2024-06-14 13:53:08,019 INFO L125 PetriNetUnfolderBase]: For 226906/226917 co-relation queries the response was YES. [2024-06-14 13:53:08,050 INFO L83 FinitePrefix]: Finished finitePrefix Result has 27676 conditions, 3755 events. 2242/3755 cut-off events. For 226906/226917 co-relation queries the response was YES. Maximal size of possible extension queue 258. Compared 23130 event pairs, 495 based on Foata normal form. 9/3757 useless extension candidates. Maximal degree in co-relation 27554. Up to 3119 conditions per place. [2024-06-14 13:53:08,065 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 248 selfloop transitions, 123 changer transitions 0/377 dead transitions. [2024-06-14 13:53:08,065 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 377 transitions, 6078 flow [2024-06-14 13:53:08,065 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:53:08,066 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:53:08,066 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:53:08,066 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 13:53:08,066 INFO L175 Difference]: Start difference. First operand has 258 places, 349 transitions, 4982 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:53:08,066 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 377 transitions, 6078 flow [2024-06-14 13:53:08,656 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 377 transitions, 5962 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:08,661 INFO L231 Difference]: Finished difference. Result has 259 places, 352 transitions, 5166 flow [2024-06-14 13:53:08,661 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4866, PETRI_DIFFERENCE_MINUEND_PLACES=252, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=349, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=120, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=229, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=5166, PETRI_PLACES=259, PETRI_TRANSITIONS=352} [2024-06-14 13:53:08,662 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-14 13:53:08,662 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 352 transitions, 5166 flow [2024-06-14 13:53:08,662 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:08,662 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:08,662 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:08,662 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-14 13:53:08,662 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)] === [2024-06-14 13:53:08,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:08,662 INFO L85 PathProgramCache]: Analyzing trace with hash -1403770479, now seen corresponding path program 1 times [2024-06-14 13:53:08,663 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:08,663 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [143104477] [2024-06-14 13:53:08,663 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:08,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:08,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:08,984 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:08,984 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:08,984 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [143104477] [2024-06-14 13:53:08,984 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [143104477] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:08,984 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:08,984 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:08,985 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1707114171] [2024-06-14 13:53:08,985 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:08,985 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:08,985 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:08,985 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:08,985 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:09,024 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:09,025 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 259 places, 352 transitions, 5166 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:09,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:09,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:09,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:09,653 INFO L124 PetriNetUnfolderBase]: 2263/3770 cut-off events. [2024-06-14 13:53:09,653 INFO L125 PetriNetUnfolderBase]: For 237009/237009 co-relation queries the response was YES. [2024-06-14 13:53:09,682 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28331 conditions, 3770 events. 2263/3770 cut-off events. For 237009/237009 co-relation queries the response was YES. Maximal size of possible extension queue 259. Compared 23103 event pairs, 503 based on Foata normal form. 1/3757 useless extension candidates. Maximal degree in co-relation 28208. Up to 2910 conditions per place. [2024-06-14 13:53:09,696 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 193 selfloop transitions, 197 changer transitions 0/396 dead transitions. [2024-06-14 13:53:09,696 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 396 transitions, 6768 flow [2024-06-14 13:53:09,697 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:09,697 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:09,697 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 13:53:09,697 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-14 13:53:09,697 INFO L175 Difference]: Start difference. First operand has 259 places, 352 transitions, 5166 flow. Second operand 8 states and 194 transitions. [2024-06-14 13:53:09,697 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 396 transitions, 6768 flow [2024-06-14 13:53:10,208 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 396 transitions, 6363 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:10,213 INFO L231 Difference]: Finished difference. Result has 261 places, 365 transitions, 5419 flow [2024-06-14 13:53:10,213 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=4761, PETRI_DIFFERENCE_MINUEND_PLACES=253, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=352, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=164, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5419, PETRI_PLACES=261, PETRI_TRANSITIONS=365} [2024-06-14 13:53:10,213 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-14 13:53:10,214 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 365 transitions, 5419 flow [2024-06-14 13:53:10,214 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:10,214 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:10,214 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:10,214 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-14 13:53:10,214 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)] === [2024-06-14 13:53:10,214 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:10,214 INFO L85 PathProgramCache]: Analyzing trace with hash 2012159873, now seen corresponding path program 2 times [2024-06-14 13:53:10,215 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:10,215 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [468762117] [2024-06-14 13:53:10,215 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:10,215 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:10,221 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:10,528 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:10,528 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:10,528 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [468762117] [2024-06-14 13:53:10,528 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [468762117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:10,528 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:10,529 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:10,529 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235835843] [2024-06-14 13:53:10,529 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:10,529 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:10,529 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:10,529 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:10,529 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:10,580 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:10,581 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 261 places, 365 transitions, 5419 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:10,581 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:10,581 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:10,581 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:11,198 INFO L124 PetriNetUnfolderBase]: 2268/3780 cut-off events. [2024-06-14 13:53:11,198 INFO L125 PetriNetUnfolderBase]: For 245162/245162 co-relation queries the response was YES. [2024-06-14 13:53:11,231 INFO L83 FinitePrefix]: Finished finitePrefix Result has 28880 conditions, 3780 events. 2268/3780 cut-off events. For 245162/245162 co-relation queries the response was YES. Maximal size of possible extension queue 260. Compared 23152 event pairs, 491 based on Foata normal form. 1/3767 useless extension candidates. Maximal degree in co-relation 28758. Up to 3154 conditions per place. [2024-06-14 13:53:11,245 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 248 selfloop transitions, 143 changer transitions 0/397 dead transitions. [2024-06-14 13:53:11,246 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 397 transitions, 6555 flow [2024-06-14 13:53:11,246 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:11,246 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:11,246 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 13:53:11,246 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 13:53:11,246 INFO L175 Difference]: Start difference. First operand has 261 places, 365 transitions, 5419 flow. Second operand 8 states and 188 transitions. [2024-06-14 13:53:11,246 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 397 transitions, 6555 flow [2024-06-14 13:53:11,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 397 transitions, 6396 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:11,827 INFO L231 Difference]: Finished difference. Result has 267 places, 368 transitions, 5582 flow [2024-06-14 13:53:11,827 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5260, PETRI_DIFFERENCE_MINUEND_PLACES=259, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=365, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=140, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=225, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5582, PETRI_PLACES=267, PETRI_TRANSITIONS=368} [2024-06-14 13:53:11,828 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-14 13:53:11,828 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 368 transitions, 5582 flow [2024-06-14 13:53:11,828 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:11,828 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:11,828 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:11,828 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-14 13:53:11,828 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)] === [2024-06-14 13:53:11,829 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:11,829 INFO L85 PathProgramCache]: Analyzing trace with hash -360786035, now seen corresponding path program 2 times [2024-06-14 13:53:11,829 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:11,829 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1529522745] [2024-06-14 13:53:11,829 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:11,829 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:11,836 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:12,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:12,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:12,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1529522745] [2024-06-14 13:53:12,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1529522745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:12,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:12,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:12,157 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1607203115] [2024-06-14 13:53:12,157 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:12,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:12,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:12,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:12,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:12,205 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:12,206 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 267 places, 368 transitions, 5582 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:12,206 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:12,206 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:12,206 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:12,921 INFO L124 PetriNetUnfolderBase]: 2297/3823 cut-off events. [2024-06-14 13:53:12,921 INFO L125 PetriNetUnfolderBase]: For 256724/256724 co-relation queries the response was YES. [2024-06-14 13:53:12,947 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29314 conditions, 3823 events. 2297/3823 cut-off events. For 256724/256724 co-relation queries the response was YES. Maximal size of possible extension queue 264. Compared 23435 event pairs, 504 based on Foata normal form. 1/3810 useless extension candidates. Maximal degree in co-relation 29189. Up to 2939 conditions per place. [2024-06-14 13:53:12,960 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 193 selfloop transitions, 207 changer transitions 0/406 dead transitions. [2024-06-14 13:53:12,960 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 406 transitions, 7138 flow [2024-06-14 13:53:12,961 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:12,961 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:12,961 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 13:53:12,961 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-14 13:53:12,961 INFO L175 Difference]: Start difference. First operand has 267 places, 368 transitions, 5582 flow. Second operand 8 states and 193 transitions. [2024-06-14 13:53:12,961 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 406 transitions, 7138 flow [2024-06-14 13:53:13,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 406 transitions, 6914 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:13,744 INFO L231 Difference]: Finished difference. Result has 270 places, 378 transitions, 5954 flow [2024-06-14 13:53:13,744 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5358, PETRI_DIFFERENCE_MINUEND_PLACES=262, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=368, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=171, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5954, PETRI_PLACES=270, PETRI_TRANSITIONS=378} [2024-06-14 13:53:13,745 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-14 13:53:13,745 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 378 transitions, 5954 flow [2024-06-14 13:53:13,745 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:13,745 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:13,745 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:13,745 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-14 13:53:13,745 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)] === [2024-06-14 13:53:13,745 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:13,745 INFO L85 PathProgramCache]: Analyzing trace with hash -361023185, now seen corresponding path program 3 times [2024-06-14 13:53:13,746 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:13,746 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1707452346] [2024-06-14 13:53:13,746 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:13,746 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:13,752 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:14,115 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:14,116 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:14,116 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1707452346] [2024-06-14 13:53:14,116 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1707452346] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:14,116 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:14,116 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:14,116 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1635964936] [2024-06-14 13:53:14,116 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:14,117 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:14,117 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:14,117 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:14,117 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:14,171 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:14,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 270 places, 378 transitions, 5954 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:14,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:14,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:14,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:14,940 INFO L124 PetriNetUnfolderBase]: 2294/3820 cut-off events. [2024-06-14 13:53:14,940 INFO L125 PetriNetUnfolderBase]: For 263913/263913 co-relation queries the response was YES. [2024-06-14 13:53:14,969 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29558 conditions, 3820 events. 2294/3820 cut-off events. For 263913/263913 co-relation queries the response was YES. Maximal size of possible extension queue 265. Compared 23448 event pairs, 504 based on Foata normal form. 1/3807 useless extension candidates. Maximal degree in co-relation 29431. Up to 2937 conditions per place. [2024-06-14 13:53:14,983 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 204 changer transitions 0/406 dead transitions. [2024-06-14 13:53:14,983 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 406 transitions, 7342 flow [2024-06-14 13:53:14,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:14,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:14,984 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-14 13:53:14,984 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-14 13:53:14,984 INFO L175 Difference]: Start difference. First operand has 270 places, 378 transitions, 5954 flow. Second operand 8 states and 193 transitions. [2024-06-14 13:53:14,984 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 406 transitions, 7342 flow [2024-06-14 13:53:15,786 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 406 transitions, 6945 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:15,791 INFO L231 Difference]: Finished difference. Result has 274 places, 378 transitions, 5971 flow [2024-06-14 13:53:15,791 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5557, PETRI_DIFFERENCE_MINUEND_PLACES=266, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=204, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=174, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5971, PETRI_PLACES=274, PETRI_TRANSITIONS=378} [2024-06-14 13:53:15,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-14 13:53:15,792 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 378 transitions, 5971 flow [2024-06-14 13:53:15,792 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:15,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:15,792 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:15,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-14 13:53:15,792 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)] === [2024-06-14 13:53:15,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:15,793 INFO L85 PathProgramCache]: Analyzing trace with hash -2083505633, now seen corresponding path program 3 times [2024-06-14 13:53:15,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:15,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1302579567] [2024-06-14 13:53:15,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:15,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:15,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:16,123 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:16,123 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:16,123 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1302579567] [2024-06-14 13:53:16,124 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1302579567] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:16,124 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:16,124 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:16,124 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [14332259] [2024-06-14 13:53:16,124 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:16,124 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:16,124 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:16,124 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:16,124 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:16,182 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:16,183 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 274 places, 378 transitions, 5971 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:16,183 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:16,183 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:16,183 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:16,833 INFO L124 PetriNetUnfolderBase]: 2307/3846 cut-off events. [2024-06-14 13:53:16,833 INFO L125 PetriNetUnfolderBase]: For 273684/273684 co-relation queries the response was YES. [2024-06-14 13:53:16,864 INFO L83 FinitePrefix]: Finished finitePrefix Result has 29809 conditions, 3846 events. 2307/3846 cut-off events. For 273684/273684 co-relation queries the response was YES. Maximal size of possible extension queue 270. Compared 23708 event pairs, 491 based on Foata normal form. 1/3833 useless extension candidates. Maximal degree in co-relation 29681. Up to 3205 conditions per place. [2024-06-14 13:53:16,878 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 257 selfloop transitions, 149 changer transitions 0/412 dead transitions. [2024-06-14 13:53:16,878 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 412 transitions, 7321 flow [2024-06-14 13:53:16,878 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:53:16,878 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:53:16,879 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-14 13:53:16,879 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 13:53:16,879 INFO L175 Difference]: Start difference. First operand has 274 places, 378 transitions, 5971 flow. Second operand 9 states and 204 transitions. [2024-06-14 13:53:16,880 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 412 transitions, 7321 flow [2024-06-14 13:53:17,667 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 412 transitions, 6987 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:53:17,673 INFO L231 Difference]: Finished difference. Result has 279 places, 384 transitions, 6015 flow [2024-06-14 13:53:17,673 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5645, PETRI_DIFFERENCE_MINUEND_PLACES=270, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=378, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=235, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=6015, PETRI_PLACES=279, PETRI_TRANSITIONS=384} [2024-06-14 13:53:17,673 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-14 13:53:17,673 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 384 transitions, 6015 flow [2024-06-14 13:53:17,673 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:17,673 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:17,674 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:17,674 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-14 13:53:17,674 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)] === [2024-06-14 13:53:17,674 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:17,674 INFO L85 PathProgramCache]: Analyzing trace with hash -1473181325, now seen corresponding path program 4 times [2024-06-14 13:53:17,674 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:17,674 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1424437375] [2024-06-14 13:53:17,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:17,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:17,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:18,004 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:18,005 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:18,005 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1424437375] [2024-06-14 13:53:18,005 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1424437375] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:18,005 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:18,005 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:18,005 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [314028054] [2024-06-14 13:53:18,005 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:18,005 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:18,005 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:18,006 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:18,006 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:18,045 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:18,046 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 279 places, 384 transitions, 6015 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:18,047 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:18,047 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:18,047 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:18,672 INFO L124 PetriNetUnfolderBase]: 2335/3901 cut-off events. [2024-06-14 13:53:18,672 INFO L125 PetriNetUnfolderBase]: For 296165/296165 co-relation queries the response was YES. [2024-06-14 13:53:18,705 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30098 conditions, 3901 events. 2335/3901 cut-off events. For 296165/296165 co-relation queries the response was YES. Maximal size of possible extension queue 275. Compared 24070 event pairs, 445 based on Foata normal form. 8/3908 useless extension candidates. Maximal degree in co-relation 29969. Up to 3491 conditions per place. [2024-06-14 13:53:18,718 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 352 selfloop transitions, 49 changer transitions 0/407 dead transitions. [2024-06-14 13:53:18,719 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 407 transitions, 6915 flow [2024-06-14 13:53:18,719 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:18,719 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:18,719 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-14 13:53:18,720 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-14 13:53:18,720 INFO L175 Difference]: Start difference. First operand has 279 places, 384 transitions, 6015 flow. Second operand 8 states and 175 transitions. [2024-06-14 13:53:18,720 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 407 transitions, 6915 flow [2024-06-14 13:53:19,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 407 transitions, 6597 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:19,726 INFO L231 Difference]: Finished difference. Result has 281 places, 385 transitions, 5820 flow [2024-06-14 13:53:19,727 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5697, PETRI_DIFFERENCE_MINUEND_PLACES=273, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=384, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=48, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5820, PETRI_PLACES=281, PETRI_TRANSITIONS=385} [2024-06-14 13:53:19,727 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-14 13:53:19,727 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 385 transitions, 5820 flow [2024-06-14 13:53:19,727 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:19,727 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:19,727 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:19,727 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-14 13:53:19,728 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)] === [2024-06-14 13:53:19,728 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:19,728 INFO L85 PathProgramCache]: Analyzing trace with hash -46491613, now seen corresponding path program 5 times [2024-06-14 13:53:19,728 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:19,728 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [920799068] [2024-06-14 13:53:19,728 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:19,728 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:19,738 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:20,078 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:20,079 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:20,079 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [920799068] [2024-06-14 13:53:20,079 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [920799068] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:20,079 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:20,079 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:20,080 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1272228029] [2024-06-14 13:53:20,080 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:20,080 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:20,080 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:20,080 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:20,081 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:20,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:20,148 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 281 places, 385 transitions, 5820 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:20,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:20,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:20,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:20,780 INFO L124 PetriNetUnfolderBase]: 2363/3951 cut-off events. [2024-06-14 13:53:20,780 INFO L125 PetriNetUnfolderBase]: For 303383/303383 co-relation queries the response was YES. [2024-06-14 13:53:20,813 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30188 conditions, 3951 events. 2363/3951 cut-off events. For 303383/303383 co-relation queries the response was YES. Maximal size of possible extension queue 282. Compared 24498 event pairs, 451 based on Foata normal form. 8/3958 useless extension candidates. Maximal degree in co-relation 30058. Up to 3535 conditions per place. [2024-06-14 13:53:20,827 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 352 selfloop transitions, 50 changer transitions 0/408 dead transitions. [2024-06-14 13:53:20,827 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 408 transitions, 6724 flow [2024-06-14 13:53:20,828 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:20,828 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:20,828 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 13:53:20,828 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 13:53:20,828 INFO L175 Difference]: Start difference. First operand has 281 places, 385 transitions, 5820 flow. Second operand 8 states and 174 transitions. [2024-06-14 13:53:20,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 408 transitions, 6724 flow [2024-06-14 13:53:21,790 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 408 transitions, 6619 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:21,796 INFO L231 Difference]: Finished difference. Result has 283 places, 386 transitions, 5842 flow [2024-06-14 13:53:21,796 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5715, PETRI_DIFFERENCE_MINUEND_PLACES=275, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=385, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=49, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=335, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5842, PETRI_PLACES=283, PETRI_TRANSITIONS=386} [2024-06-14 13:53:21,796 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-14 13:53:21,796 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 386 transitions, 5842 flow [2024-06-14 13:53:21,796 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:21,796 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:21,796 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:21,797 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-14 13:53:21,797 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)] === [2024-06-14 13:53:21,797 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:21,797 INFO L85 PathProgramCache]: Analyzing trace with hash 1107391183, now seen corresponding path program 6 times [2024-06-14 13:53:21,797 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:21,797 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [592298606] [2024-06-14 13:53:21,797 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:21,797 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:21,804 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:22,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:22,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:22,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [592298606] [2024-06-14 13:53:22,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [592298606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:22,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:22,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:22,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784296127] [2024-06-14 13:53:22,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:22,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:22,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:22,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:22,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:22,227 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:22,227 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 283 places, 386 transitions, 5842 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:22,227 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:22,227 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:22,227 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:23,016 INFO L124 PetriNetUnfolderBase]: 2383/3981 cut-off events. [2024-06-14 13:53:23,017 INFO L125 PetriNetUnfolderBase]: For 306965/306965 co-relation queries the response was YES. [2024-06-14 13:53:23,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 30470 conditions, 3981 events. 2383/3981 cut-off events. For 306965/306965 co-relation queries the response was YES. Maximal size of possible extension queue 283. Compared 24719 event pairs, 449 based on Foata normal form. 6/3986 useless extension candidates. Maximal degree in co-relation 30339. Up to 3505 conditions per place. [2024-06-14 13:53:23,077 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 354 selfloop transitions, 52 changer transitions 0/412 dead transitions. [2024-06-14 13:53:23,077 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 412 transitions, 6774 flow [2024-06-14 13:53:23,078 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:23,078 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:23,078 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-14 13:53:23,079 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-14 13:53:23,079 INFO L175 Difference]: Start difference. First operand has 283 places, 386 transitions, 5842 flow. Second operand 8 states and 177 transitions. [2024-06-14 13:53:23,079 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 412 transitions, 6774 flow [2024-06-14 13:53:23,991 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 412 transitions, 6665 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:23,996 INFO L231 Difference]: Finished difference. Result has 285 places, 387 transitions, 5865 flow [2024-06-14 13:53:23,996 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5733, PETRI_DIFFERENCE_MINUEND_PLACES=277, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=386, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=51, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=334, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=5865, PETRI_PLACES=285, PETRI_TRANSITIONS=387} [2024-06-14 13:53:23,997 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-14 13:53:23,997 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 387 transitions, 5865 flow [2024-06-14 13:53:23,997 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:23,997 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:23,997 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:23,997 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-14 13:53:23,997 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)] === [2024-06-14 13:53:23,997 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:23,997 INFO L85 PathProgramCache]: Analyzing trace with hash -1253853507, now seen corresponding path program 4 times [2024-06-14 13:53:23,998 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:23,998 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [531497619] [2024-06-14 13:53:23,998 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:23,998 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:24,004 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:24,307 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:24,308 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:24,308 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [531497619] [2024-06-14 13:53:24,308 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [531497619] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:24,308 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:24,308 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:24,308 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [646245778] [2024-06-14 13:53:24,308 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:24,308 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:24,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:24,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:24,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:24,341 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:24,342 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 285 places, 387 transitions, 5865 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:24,342 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:24,342 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:24,342 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:25,023 INFO L124 PetriNetUnfolderBase]: 2412/4033 cut-off events. [2024-06-14 13:53:25,023 INFO L125 PetriNetUnfolderBase]: For 313036/313053 co-relation queries the response was YES. [2024-06-14 13:53:25,057 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31035 conditions, 4033 events. 2412/4033 cut-off events. For 313036/313053 co-relation queries the response was YES. Maximal size of possible extension queue 290. Compared 25177 event pairs, 488 based on Foata normal form. 13/4040 useless extension candidates. Maximal degree in co-relation 30903. Up to 3405 conditions per place. [2024-06-14 13:53:25,073 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 288 selfloop transitions, 135 changer transitions 0/429 dead transitions. [2024-06-14 13:53:25,073 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 429 transitions, 7358 flow [2024-06-14 13:53:25,074 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:25,074 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:25,074 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 13:53:25,074 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 13:53:25,074 INFO L175 Difference]: Start difference. First operand has 285 places, 387 transitions, 5865 flow. Second operand 8 states and 188 transitions. [2024-06-14 13:53:25,074 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 429 transitions, 7358 flow [2024-06-14 13:53:25,870 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 429 transitions, 7240 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:25,876 INFO L231 Difference]: Finished difference. Result has 287 places, 399 transitions, 6177 flow [2024-06-14 13:53:25,876 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5747, PETRI_DIFFERENCE_MINUEND_PLACES=279, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=387, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=264, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6177, PETRI_PLACES=287, PETRI_TRANSITIONS=399} [2024-06-14 13:53:25,876 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-14 13:53:25,876 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 399 transitions, 6177 flow [2024-06-14 13:53:25,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:25,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:25,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:25,877 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-14 13:53:25,877 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)] === [2024-06-14 13:53:25,877 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:25,878 INFO L85 PathProgramCache]: Analyzing trace with hash 521657217, now seen corresponding path program 5 times [2024-06-14 13:53:25,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:25,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [139269062] [2024-06-14 13:53:25,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:25,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:25,885 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:26,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:26,231 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:26,231 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [139269062] [2024-06-14 13:53:26,231 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [139269062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:26,231 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:26,231 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:53:26,231 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927468639] [2024-06-14 13:53:26,231 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:26,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:53:26,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:26,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:53:26,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:53:26,300 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:26,301 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 287 places, 399 transitions, 6177 flow. Second operand has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:26,301 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:26,301 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:26,301 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:27,011 INFO L124 PetriNetUnfolderBase]: 2425/4050 cut-off events. [2024-06-14 13:53:27,011 INFO L125 PetriNetUnfolderBase]: For 321590/321596 co-relation queries the response was YES. [2024-06-14 13:53:27,044 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31504 conditions, 4050 events. 2425/4050 cut-off events. For 321590/321596 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 25264 event pairs, 459 based on Foata normal form. 5/4053 useless extension candidates. Maximal degree in co-relation 31371. Up to 3420 conditions per place. [2024-06-14 13:53:27,058 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 285 selfloop transitions, 149 changer transitions 0/440 dead transitions. [2024-06-14 13:53:27,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 440 transitions, 7635 flow [2024-06-14 13:53:27,059 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:27,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:27,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-14 13:53:27,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-14 13:53:27,059 INFO L175 Difference]: Start difference. First operand has 287 places, 399 transitions, 6177 flow. Second operand 10 states and 226 transitions. [2024-06-14 13:53:27,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 440 transitions, 7635 flow [2024-06-14 13:53:28,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 440 transitions, 7343 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:28,420 INFO L231 Difference]: Finished difference. Result has 292 places, 405 transitions, 6267 flow [2024-06-14 13:53:28,420 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=5897, PETRI_DIFFERENCE_MINUEND_PLACES=282, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=399, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=143, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=256, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6267, PETRI_PLACES=292, PETRI_TRANSITIONS=405} [2024-06-14 13:53:28,420 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-14 13:53:28,420 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 405 transitions, 6267 flow [2024-06-14 13:53:28,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 14.88888888888889) internal successors, (134), 9 states have internal predecessors, (134), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:28,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:28,421 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:28,421 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-14 13:53:28,421 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)] === [2024-06-14 13:53:28,421 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:28,421 INFO L85 PathProgramCache]: Analyzing trace with hash 1619901777, now seen corresponding path program 6 times [2024-06-14 13:53:28,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:28,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [244158257] [2024-06-14 13:53:28,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:28,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:28,431 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:28,753 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:28,753 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:28,753 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [244158257] [2024-06-14 13:53:28,753 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [244158257] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:28,753 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:28,754 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:53:28,754 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [889033356] [2024-06-14 13:53:28,754 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:28,754 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:53:28,754 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:28,754 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:53:28,754 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:53:28,789 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:28,789 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 292 places, 405 transitions, 6267 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:28,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:28,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:28,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:29,503 INFO L124 PetriNetUnfolderBase]: 2422/4049 cut-off events. [2024-06-14 13:53:29,504 INFO L125 PetriNetUnfolderBase]: For 330020/330031 co-relation queries the response was YES. [2024-06-14 13:53:29,534 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31549 conditions, 4049 events. 2422/4049 cut-off events. For 330020/330031 co-relation queries the response was YES. Maximal size of possible extension queue 294. Compared 25288 event pairs, 508 based on Foata normal form. 9/4051 useless extension candidates. Maximal degree in co-relation 31415. Up to 3417 conditions per place. [2024-06-14 13:53:29,548 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 291 selfloop transitions, 129 changer transitions 0/426 dead transitions. [2024-06-14 13:53:29,548 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 426 transitions, 7447 flow [2024-06-14 13:53:29,549 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:53:29,549 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:53:29,549 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-14 13:53:29,549 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:53:29,549 INFO L175 Difference]: Start difference. First operand has 292 places, 405 transitions, 6267 flow. Second operand 6 states and 144 transitions. [2024-06-14 13:53:29,549 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 426 transitions, 7447 flow [2024-06-14 13:53:30,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 426 transitions, 7191 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:30,564 INFO L231 Difference]: Finished difference. Result has 293 places, 405 transitions, 6276 flow [2024-06-14 13:53:30,564 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6011, PETRI_DIFFERENCE_MINUEND_PLACES=287, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=276, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=6276, PETRI_PLACES=293, PETRI_TRANSITIONS=405} [2024-06-14 13:53:30,565 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-14 13:53:30,565 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 405 transitions, 6276 flow [2024-06-14 13:53:30,565 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:30,565 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:30,565 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:30,565 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-14 13:53:30,565 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)] === [2024-06-14 13:53:30,566 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:30,566 INFO L85 PathProgramCache]: Analyzing trace with hash 516116463, now seen corresponding path program 4 times [2024-06-14 13:53:30,566 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:30,566 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555450076] [2024-06-14 13:53:30,566 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:30,566 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:30,575 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:30,888 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:30,888 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:30,888 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555450076] [2024-06-14 13:53:30,888 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555450076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:30,888 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:30,888 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:30,888 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [552286462] [2024-06-14 13:53:30,888 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:30,889 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:30,889 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:30,889 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:30,889 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:30,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:30,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 293 places, 405 transitions, 6276 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:30,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:30,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:30,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:31,626 INFO L124 PetriNetUnfolderBase]: 2445/4078 cut-off events. [2024-06-14 13:53:31,626 INFO L125 PetriNetUnfolderBase]: For 339807/339807 co-relation queries the response was YES. [2024-06-14 13:53:31,659 INFO L83 FinitePrefix]: Finished finitePrefix Result has 31946 conditions, 4078 events. 2445/4078 cut-off events. For 339807/339807 co-relation queries the response was YES. Maximal size of possible extension queue 298. Compared 25459 event pairs, 490 based on Foata normal form. 1/4071 useless extension candidates. Maximal degree in co-relation 31810. Up to 3481 conditions per place. [2024-06-14 13:53:31,674 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 310 selfloop transitions, 128 changer transitions 0/444 dead transitions. [2024-06-14 13:53:31,675 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 444 transitions, 7831 flow [2024-06-14 13:53:31,676 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:31,676 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:31,677 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-14 13:53:31,677 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-14 13:53:31,678 INFO L175 Difference]: Start difference. First operand has 293 places, 405 transitions, 6276 flow. Second operand 8 states and 187 transitions. [2024-06-14 13:53:31,678 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 444 transitions, 7831 flow [2024-06-14 13:53:32,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 444 transitions, 7567 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:53:32,713 INFO L231 Difference]: Finished difference. Result has 297 places, 417 transitions, 6483 flow [2024-06-14 13:53:32,714 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6012, PETRI_DIFFERENCE_MINUEND_PLACES=288, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=405, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=283, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6483, PETRI_PLACES=297, PETRI_TRANSITIONS=417} [2024-06-14 13:53:32,714 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-14 13:53:32,714 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 417 transitions, 6483 flow [2024-06-14 13:53:32,714 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:32,714 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:32,714 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:32,714 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-14 13:53:32,714 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)] === [2024-06-14 13:53:32,715 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:32,715 INFO L85 PathProgramCache]: Analyzing trace with hash -253350583, now seen corresponding path program 7 times [2024-06-14 13:53:32,715 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:32,715 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1559814918] [2024-06-14 13:53:32,715 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:32,715 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:32,721 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:33,036 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:33,036 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:33,036 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1559814918] [2024-06-14 13:53:33,036 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1559814918] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:33,037 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:33,037 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:33,037 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929801402] [2024-06-14 13:53:33,037 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:33,037 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:33,037 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:33,037 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:33,037 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:33,090 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:33,091 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 297 places, 417 transitions, 6483 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:33,091 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:33,091 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:33,091 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:33,795 INFO L124 PetriNetUnfolderBase]: 2450/4089 cut-off events. [2024-06-14 13:53:33,796 INFO L125 PetriNetUnfolderBase]: For 348084/348084 co-relation queries the response was YES. [2024-06-14 13:53:33,832 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32133 conditions, 4089 events. 2450/4089 cut-off events. For 348084/348084 co-relation queries the response was YES. Maximal size of possible extension queue 301. Compared 25558 event pairs, 479 based on Foata normal form. 1/4082 useless extension candidates. Maximal degree in co-relation 31995. Up to 3604 conditions per place. [2024-06-14 13:53:33,849 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 357 selfloop transitions, 81 changer transitions 0/444 dead transitions. [2024-06-14 13:53:33,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 444 transitions, 7445 flow [2024-06-14 13:53:33,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:33,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:33,850 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:53:33,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:53:33,850 INFO L175 Difference]: Start difference. First operand has 297 places, 417 transitions, 6483 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:53:33,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 444 transitions, 7445 flow [2024-06-14 13:53:34,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 444 transitions, 7248 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:34,860 INFO L231 Difference]: Finished difference. Result has 302 places, 420 transitions, 6486 flow [2024-06-14 13:53:34,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6286, PETRI_DIFFERENCE_MINUEND_PLACES=294, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=417, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6486, PETRI_PLACES=302, PETRI_TRANSITIONS=420} [2024-06-14 13:53:34,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-14 13:53:34,860 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 420 transitions, 6486 flow [2024-06-14 13:53:34,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:34,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:34,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:34,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-14 13:53:34,861 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)] === [2024-06-14 13:53:34,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:34,861 INFO L85 PathProgramCache]: Analyzing trace with hash 82560687, now seen corresponding path program 1 times [2024-06-14 13:53:34,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:34,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [90374481] [2024-06-14 13:53:34,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:34,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:34,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:35,192 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:35,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:35,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [90374481] [2024-06-14 13:53:35,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [90374481] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:35,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:35,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:35,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [205981456] [2024-06-14 13:53:35,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:35,193 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:35,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:35,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:35,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:35,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:35,234 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 302 places, 420 transitions, 6486 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:35,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:35,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:35,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:35,990 INFO L124 PetriNetUnfolderBase]: 2468/4116 cut-off events. [2024-06-14 13:53:35,990 INFO L125 PetriNetUnfolderBase]: For 359436/359436 co-relation queries the response was YES. [2024-06-14 13:53:36,023 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32422 conditions, 4116 events. 2468/4116 cut-off events. For 359436/359436 co-relation queries the response was YES. Maximal size of possible extension queue 305. Compared 25766 event pairs, 489 based on Foata normal form. 1/4109 useless extension candidates. Maximal degree in co-relation 32283. Up to 3546 conditions per place. [2024-06-14 13:53:36,039 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 329 selfloop transitions, 118 changer transitions 0/453 dead transitions. [2024-06-14 13:53:36,039 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 453 transitions, 8014 flow [2024-06-14 13:53:36,040 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:36,040 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:36,040 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 13:53:36,040 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:53:36,040 INFO L175 Difference]: Start difference. First operand has 302 places, 420 transitions, 6486 flow. Second operand 8 states and 184 transitions. [2024-06-14 13:53:36,040 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 453 transitions, 8014 flow [2024-06-14 13:53:37,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 453 transitions, 7852 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-14 13:53:37,405 INFO L231 Difference]: Finished difference. Result has 304 places, 429 transitions, 6692 flow [2024-06-14 13:53:37,405 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6324, PETRI_DIFFERENCE_MINUEND_PLACES=296, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=420, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=109, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=311, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6692, PETRI_PLACES=304, PETRI_TRANSITIONS=429} [2024-06-14 13:53:37,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-14 13:53:37,405 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 429 transitions, 6692 flow [2024-06-14 13:53:37,405 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:37,405 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:37,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:37,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-14 13:53:37,406 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)] === [2024-06-14 13:53:37,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:37,406 INFO L85 PathProgramCache]: Analyzing trace with hash 1629160857, now seen corresponding path program 8 times [2024-06-14 13:53:37,406 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:37,406 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [906750940] [2024-06-14 13:53:37,406 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:37,406 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:37,413 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:37,724 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:37,725 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:37,725 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [906750940] [2024-06-14 13:53:37,725 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [906750940] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:37,725 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:37,725 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:37,725 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660638587] [2024-06-14 13:53:37,725 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:37,725 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:37,725 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:37,726 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:37,726 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:37,783 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:37,783 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 304 places, 429 transitions, 6692 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:37,783 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:37,783 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:37,783 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:38,550 INFO L124 PetriNetUnfolderBase]: 2481/4137 cut-off events. [2024-06-14 13:53:38,550 INFO L125 PetriNetUnfolderBase]: For 371403/371403 co-relation queries the response was YES. [2024-06-14 13:53:38,586 INFO L83 FinitePrefix]: Finished finitePrefix Result has 32817 conditions, 4137 events. 2481/4137 cut-off events. For 371403/371403 co-relation queries the response was YES. Maximal size of possible extension queue 308. Compared 25902 event pairs, 478 based on Foata normal form. 1/4130 useless extension candidates. Maximal degree in co-relation 32677. Up to 3640 conditions per place. [2024-06-14 13:53:38,601 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 371 selfloop transitions, 88 changer transitions 0/465 dead transitions. [2024-06-14 13:53:38,602 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 465 transitions, 7906 flow [2024-06-14 13:53:38,602 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:53:38,602 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:53:38,602 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 266 transitions. [2024-06-14 13:53:38,603 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49906191369606 [2024-06-14 13:53:38,603 INFO L175 Difference]: Start difference. First operand has 304 places, 429 transitions, 6692 flow. Second operand 13 states and 266 transitions. [2024-06-14 13:53:38,603 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 465 transitions, 7906 flow [2024-06-14 13:53:40,158 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 465 transitions, 7692 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-14 13:53:40,164 INFO L231 Difference]: Finished difference. Result has 315 places, 435 transitions, 6748 flow [2024-06-14 13:53:40,164 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6478, PETRI_DIFFERENCE_MINUEND_PLACES=301, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=429, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=341, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=6748, PETRI_PLACES=315, PETRI_TRANSITIONS=435} [2024-06-14 13:53:40,164 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-14 13:53:40,164 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 435 transitions, 6748 flow [2024-06-14 13:53:40,164 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:40,165 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:40,165 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] [2024-06-14 13:53:40,165 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-14 13:53:40,165 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)] === [2024-06-14 13:53:40,165 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:40,165 INFO L85 PathProgramCache]: Analyzing trace with hash -1249841301, now seen corresponding path program 5 times [2024-06-14 13:53:40,165 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:40,165 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [924624780] [2024-06-14 13:53:40,165 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:40,165 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:40,173 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:40,520 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:40,520 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:40,520 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [924624780] [2024-06-14 13:53:40,520 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [924624780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:40,520 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:40,520 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:40,520 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1617311896] [2024-06-14 13:53:40,520 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:40,521 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:40,521 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:40,521 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:40,521 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:40,559 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:40,560 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 435 transitions, 6748 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:40,560 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:40,560 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:40,560 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:41,381 INFO L124 PetriNetUnfolderBase]: 2494/4161 cut-off events. [2024-06-14 13:53:41,381 INFO L125 PetriNetUnfolderBase]: For 384688/384688 co-relation queries the response was YES. [2024-06-14 13:53:41,422 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33114 conditions, 4161 events. 2494/4161 cut-off events. For 384688/384688 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26166 event pairs, 492 based on Foata normal form. 1/4154 useless extension candidates. Maximal degree in co-relation 32971. Up to 3538 conditions per place. [2024-06-14 13:53:41,440 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 321 selfloop transitions, 144 changer transitions 0/471 dead transitions. [2024-06-14 13:53:41,440 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 471 transitions, 8494 flow [2024-06-14 13:53:41,441 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:41,441 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:41,441 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-14 13:53:41,441 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:53:41,441 INFO L175 Difference]: Start difference. First operand has 315 places, 435 transitions, 6748 flow. Second operand 10 states and 225 transitions. [2024-06-14 13:53:41,441 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 471 transitions, 8494 flow [2024-06-14 13:53:42,852 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 471 transitions, 8302 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:42,858 INFO L231 Difference]: Finished difference. Result has 315 places, 441 transitions, 6978 flow [2024-06-14 13:53:42,858 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6556, PETRI_DIFFERENCE_MINUEND_PLACES=305, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=435, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=297, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6978, PETRI_PLACES=315, PETRI_TRANSITIONS=441} [2024-06-14 13:53:42,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-14 13:53:42,858 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 441 transitions, 6978 flow [2024-06-14 13:53:42,859 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:42,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:42,859 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:42,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-14 13:53:42,859 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)] === [2024-06-14 13:53:42,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:42,860 INFO L85 PathProgramCache]: Analyzing trace with hash 82560315, now seen corresponding path program 9 times [2024-06-14 13:53:42,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:42,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [198869853] [2024-06-14 13:53:42,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:42,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:42,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:43,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:43,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:43,179 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [198869853] [2024-06-14 13:53:43,179 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [198869853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:43,179 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:43,179 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:43,179 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [521692336] [2024-06-14 13:53:43,179 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:43,179 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:43,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:43,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:43,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:43,249 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:43,250 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 315 places, 441 transitions, 6978 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:43,250 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:43,250 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:43,250 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:44,080 INFO L124 PetriNetUnfolderBase]: 2491/4157 cut-off events. [2024-06-14 13:53:44,080 INFO L125 PetriNetUnfolderBase]: For 390954/390954 co-relation queries the response was YES. [2024-06-14 13:53:44,114 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33264 conditions, 4157 events. 2491/4157 cut-off events. For 390954/390954 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26118 event pairs, 478 based on Foata normal form. 1/4150 useless extension candidates. Maximal degree in co-relation 33120. Up to 3655 conditions per place. [2024-06-14 13:53:44,128 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 88 changer transitions 0/468 dead transitions. [2024-06-14 13:53:44,129 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 468 transitions, 7968 flow [2024-06-14 13:53:44,129 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:44,129 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:44,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-14 13:53:44,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:53:44,130 INFO L175 Difference]: Start difference. First operand has 315 places, 441 transitions, 6978 flow. Second operand 11 states and 231 transitions. [2024-06-14 13:53:44,130 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 468 transitions, 7968 flow [2024-06-14 13:53:45,575 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 468 transitions, 7626 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:45,581 INFO L231 Difference]: Finished difference. Result has 319 places, 441 transitions, 6818 flow [2024-06-14 13:53:45,582 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6636, PETRI_DIFFERENCE_MINUEND_PLACES=308, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=353, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6818, PETRI_PLACES=319, PETRI_TRANSITIONS=441} [2024-06-14 13:53:45,582 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-14 13:53:45,582 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 441 transitions, 6818 flow [2024-06-14 13:53:45,582 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:45,582 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:45,583 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:45,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-14 13:53:45,583 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)] === [2024-06-14 13:53:45,583 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:45,583 INFO L85 PathProgramCache]: Analyzing trace with hash 1629172203, now seen corresponding path program 6 times [2024-06-14 13:53:45,583 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:45,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1320686480] [2024-06-14 13:53:45,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:45,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:45,593 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:45,889 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:45,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:45,890 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1320686480] [2024-06-14 13:53:45,890 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1320686480] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:45,890 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:45,890 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:45,890 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1536338587] [2024-06-14 13:53:45,890 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:45,890 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:45,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:45,891 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:45,891 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:45,955 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:45,955 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 441 transitions, 6818 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:45,955 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:45,955 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:45,955 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:46,683 INFO L124 PetriNetUnfolderBase]: 2488/4154 cut-off events. [2024-06-14 13:53:46,683 INFO L125 PetriNetUnfolderBase]: For 395927/395927 co-relation queries the response was YES. [2024-06-14 13:53:46,723 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33069 conditions, 4154 events. 2488/4154 cut-off events. For 395927/395927 co-relation queries the response was YES. Maximal size of possible extension queue 314. Compared 26150 event pairs, 492 based on Foata normal form. 1/4147 useless extension candidates. Maximal degree in co-relation 32924. Up to 3531 conditions per place. [2024-06-14 13:53:46,737 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 319 selfloop transitions, 146 changer transitions 0/471 dead transitions. [2024-06-14 13:53:46,737 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 471 transitions, 8294 flow [2024-06-14 13:53:46,738 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:46,738 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:46,738 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-14 13:53:46,738 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277161862527716 [2024-06-14 13:53:46,738 INFO L175 Difference]: Start difference. First operand has 319 places, 441 transitions, 6818 flow. Second operand 11 states and 238 transitions. [2024-06-14 13:53:46,738 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 471 transitions, 8294 flow [2024-06-14 13:53:48,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 471 transitions, 8123 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-14 13:53:48,022 INFO L231 Difference]: Finished difference. Result has 321 places, 441 transitions, 6945 flow [2024-06-14 13:53:48,022 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6647, PETRI_DIFFERENCE_MINUEND_PLACES=310, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=146, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=295, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=6945, PETRI_PLACES=321, PETRI_TRANSITIONS=441} [2024-06-14 13:53:48,022 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-14 13:53:48,022 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 441 transitions, 6945 flow [2024-06-14 13:53:48,022 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:48,022 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:48,022 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:48,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-14 13:53:48,022 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)] === [2024-06-14 13:53:48,023 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:48,023 INFO L85 PathProgramCache]: Analyzing trace with hash 428261335, now seen corresponding path program 2 times [2024-06-14 13:53:48,023 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:48,023 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1103318745] [2024-06-14 13:53:48,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:48,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:48,032 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:48,371 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:48,371 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:48,371 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1103318745] [2024-06-14 13:53:48,371 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1103318745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:48,371 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:48,371 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:48,371 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [761462335] [2024-06-14 13:53:48,372 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:48,372 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:48,372 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:48,372 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:48,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:48,413 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:48,414 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 321 places, 441 transitions, 6945 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:48,414 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:48,414 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:48,414 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:49,165 INFO L124 PetriNetUnfolderBase]: 2485/4149 cut-off events. [2024-06-14 13:53:49,165 INFO L125 PetriNetUnfolderBase]: For 402537/402537 co-relation queries the response was YES. [2024-06-14 13:53:49,203 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33238 conditions, 4149 events. 2485/4149 cut-off events. For 402537/402537 co-relation queries the response was YES. Maximal size of possible extension queue 313. Compared 26029 event pairs, 491 based on Foata normal form. 1/4142 useless extension candidates. Maximal degree in co-relation 33092. Up to 3571 conditions per place. [2024-06-14 13:53:49,218 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 340 selfloop transitions, 118 changer transitions 0/464 dead transitions. [2024-06-14 13:53:49,218 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 464 transitions, 8237 flow [2024-06-14 13:53:49,219 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:49,219 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:49,219 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-14 13:53:49,219 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-14 13:53:49,220 INFO L175 Difference]: Start difference. First operand has 321 places, 441 transitions, 6945 flow. Second operand 8 states and 181 transitions. [2024-06-14 13:53:49,220 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 464 transitions, 8237 flow [2024-06-14 13:53:50,461 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 464 transitions, 7927 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-14 13:53:50,468 INFO L231 Difference]: Finished difference. Result has 319 places, 441 transitions, 6877 flow [2024-06-14 13:53:50,468 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6635, PETRI_DIFFERENCE_MINUEND_PLACES=311, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=118, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=323, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=6877, PETRI_PLACES=319, PETRI_TRANSITIONS=441} [2024-06-14 13:53:50,468 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-14 13:53:50,468 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 441 transitions, 6877 flow [2024-06-14 13:53:50,468 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:50,468 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:50,469 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:50,469 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-14 13:53:50,469 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)] === [2024-06-14 13:53:50,469 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:50,469 INFO L85 PathProgramCache]: Analyzing trace with hash -53731663, now seen corresponding path program 10 times [2024-06-14 13:53:50,469 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:50,469 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1936409719] [2024-06-14 13:53:50,469 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:50,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:50,477 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:50,798 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:50,798 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:50,798 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1936409719] [2024-06-14 13:53:50,799 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1936409719] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:50,799 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:50,799 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:50,799 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2029204258] [2024-06-14 13:53:50,799 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:50,799 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:50,799 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:50,799 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:50,799 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:50,848 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:50,849 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 319 places, 441 transitions, 6877 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:50,849 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:50,849 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:50,849 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:51,594 INFO L124 PetriNetUnfolderBase]: 2498/4175 cut-off events. [2024-06-14 13:53:51,594 INFO L125 PetriNetUnfolderBase]: For 414709/414709 co-relation queries the response was YES. [2024-06-14 13:53:51,635 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33479 conditions, 4175 events. 2498/4175 cut-off events. For 414709/414709 co-relation queries the response was YES. Maximal size of possible extension queue 319. Compared 26311 event pairs, 476 based on Foata normal form. 1/4168 useless extension candidates. Maximal degree in co-relation 33332. Up to 3685 conditions per place. [2024-06-14 13:53:51,652 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 389 selfloop transitions, 73 changer transitions 0/468 dead transitions. [2024-06-14 13:53:51,652 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 468 transitions, 8097 flow [2024-06-14 13:53:51,653 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:53:51,653 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:53:51,653 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-14 13:53:51,653 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 13:53:51,653 INFO L175 Difference]: Start difference. First operand has 319 places, 441 transitions, 6877 flow. Second operand 10 states and 210 transitions. [2024-06-14 13:53:51,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 468 transitions, 8097 flow [2024-06-14 13:53:53,040 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 468 transitions, 7853 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:53,045 INFO L231 Difference]: Finished difference. Result has 323 places, 447 transitions, 6889 flow [2024-06-14 13:53:53,046 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6633, PETRI_DIFFERENCE_MINUEND_PLACES=312, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=441, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=67, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=6889, PETRI_PLACES=323, PETRI_TRANSITIONS=447} [2024-06-14 13:53:53,046 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-14 13:53:53,046 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 447 transitions, 6889 flow [2024-06-14 13:53:53,046 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:53,046 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:53,046 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:53,046 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-14 13:53:53,046 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)] === [2024-06-14 13:53:53,047 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:53,047 INFO L85 PathProgramCache]: Analyzing trace with hash -53731477, now seen corresponding path program 7 times [2024-06-14 13:53:53,047 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:53,047 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1003735521] [2024-06-14 13:53:53,047 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:53,047 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:53,054 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:53,358 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:53,359 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:53,359 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1003735521] [2024-06-14 13:53:53,359 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1003735521] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:53,359 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:53,359 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:53,359 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446798666] [2024-06-14 13:53:53,359 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:53,359 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:53,359 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:53,359 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:53,360 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:53,400 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:53,400 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 323 places, 447 transitions, 6889 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:53,400 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:53,400 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:53,400 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:54,184 INFO L124 PetriNetUnfolderBase]: 2511/4195 cut-off events. [2024-06-14 13:53:54,184 INFO L125 PetriNetUnfolderBase]: For 427860/427860 co-relation queries the response was YES. [2024-06-14 13:53:54,226 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33760 conditions, 4195 events. 2511/4195 cut-off events. For 427860/427860 co-relation queries the response was YES. Maximal size of possible extension queue 322. Compared 26442 event pairs, 492 based on Foata normal form. 1/4188 useless extension candidates. Maximal degree in co-relation 33611. Up to 3597 conditions per place. [2024-06-14 13:53:54,241 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 344 selfloop transitions, 124 changer transitions 0/474 dead transitions. [2024-06-14 13:53:54,241 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 474 transitions, 8495 flow [2024-06-14 13:53:54,242 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:54,242 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:54,242 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-14 13:53:54,242 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-14 13:53:54,242 INFO L175 Difference]: Start difference. First operand has 323 places, 447 transitions, 6889 flow. Second operand 8 states and 182 transitions. [2024-06-14 13:53:54,242 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 474 transitions, 8495 flow [2024-06-14 13:53:55,543 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 474 transitions, 8325 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-14 13:53:55,550 INFO L231 Difference]: Finished difference. Result has 324 places, 453 transitions, 7107 flow [2024-06-14 13:53:55,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6719, PETRI_DIFFERENCE_MINUEND_PLACES=316, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=447, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=121, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=326, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7107, PETRI_PLACES=324, PETRI_TRANSITIONS=453} [2024-06-14 13:53:55,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-14 13:53:55,550 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 453 transitions, 7107 flow [2024-06-14 13:53:55,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:55,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:55,551 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:55,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-14 13:53:55,551 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)] === [2024-06-14 13:53:55,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:55,551 INFO L85 PathProgramCache]: Analyzing trace with hash -1492740805, now seen corresponding path program 11 times [2024-06-14 13:53:55,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:55,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966554557] [2024-06-14 13:53:55,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:55,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:55,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:55,880 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:55,881 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:55,881 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966554557] [2024-06-14 13:53:55,881 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966554557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:55,881 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:55,881 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:55,881 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [481943990] [2024-06-14 13:53:55,881 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:55,881 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:55,881 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:55,882 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:55,882 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:55,935 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:55,935 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 324 places, 453 transitions, 7107 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:55,936 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:55,936 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:55,936 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:56,754 INFO L124 PetriNetUnfolderBase]: 2508/4193 cut-off events. [2024-06-14 13:53:56,754 INFO L125 PetriNetUnfolderBase]: For 434270/434270 co-relation queries the response was YES. [2024-06-14 13:53:56,789 INFO L83 FinitePrefix]: Finished finitePrefix Result has 33886 conditions, 4193 events. 2508/4193 cut-off events. For 434270/434270 co-relation queries the response was YES. Maximal size of possible extension queue 323. Compared 26450 event pairs, 476 based on Foata normal form. 1/4186 useless extension candidates. Maximal degree in co-relation 33736. Up to 3700 conditions per place. [2024-06-14 13:53:56,804 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 395 selfloop transitions, 73 changer transitions 0/474 dead transitions. [2024-06-14 13:53:56,804 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 474 transitions, 8093 flow [2024-06-14 13:53:56,805 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:53:56,805 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:53:56,805 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-14 13:53:56,805 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49889135254988914 [2024-06-14 13:53:56,805 INFO L175 Difference]: Start difference. First operand has 324 places, 453 transitions, 7107 flow. Second operand 11 states and 225 transitions. [2024-06-14 13:53:56,805 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 474 transitions, 8093 flow [2024-06-14 13:53:58,429 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 474 transitions, 7918 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-14 13:53:58,438 INFO L231 Difference]: Finished difference. Result has 333 places, 453 transitions, 7084 flow [2024-06-14 13:53:58,438 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6932, PETRI_DIFFERENCE_MINUEND_PLACES=322, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=73, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=380, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7084, PETRI_PLACES=333, PETRI_TRANSITIONS=453} [2024-06-14 13:53:58,439 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-14 13:53:58,439 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 453 transitions, 7084 flow [2024-06-14 13:53:58,439 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:58,439 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:53:58,439 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:53:58,439 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-14 13:53:58,440 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)] === [2024-06-14 13:53:58,440 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:53:58,440 INFO L85 PathProgramCache]: Analyzing trace with hash -399183423, now seen corresponding path program 8 times [2024-06-14 13:53:58,440 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:53:58,440 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207502986] [2024-06-14 13:53:58,441 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:53:58,441 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:53:58,449 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:53:58,848 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:53:58,848 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:53:58,848 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207502986] [2024-06-14 13:53:58,848 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207502986] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:53:58,848 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:53:58,848 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:53:58,848 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1267616278] [2024-06-14 13:53:58,849 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:53:58,849 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:53:58,849 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:53:58,849 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:53:58,849 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:53:58,895 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:53:58,896 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 333 places, 453 transitions, 7084 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:53:58,896 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:53:58,896 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:53:58,896 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:53:59,644 INFO L124 PetriNetUnfolderBase]: 2553/4245 cut-off events. [2024-06-14 13:53:59,644 INFO L125 PetriNetUnfolderBase]: For 463358/463358 co-relation queries the response was YES. [2024-06-14 13:53:59,687 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35058 conditions, 4245 events. 2553/4245 cut-off events. For 463358/463358 co-relation queries the response was YES. Maximal size of possible extension queue 330. Compared 26741 event pairs, 534 based on Foata normal form. 1/4232 useless extension candidates. Maximal degree in co-relation 34906. Up to 3199 conditions per place. [2024-06-14 13:53:59,704 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 212 selfloop transitions, 271 changer transitions 0/489 dead transitions. [2024-06-14 13:53:59,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 489 transitions, 9062 flow [2024-06-14 13:53:59,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:53:59,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:53:59,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 13:53:59,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 13:53:59,705 INFO L175 Difference]: Start difference. First operand has 333 places, 453 transitions, 7084 flow. Second operand 8 states and 188 transitions. [2024-06-14 13:53:59,705 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 489 transitions, 9062 flow [2024-06-14 13:54:01,212 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 489 transitions, 8937 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:01,219 INFO L231 Difference]: Finished difference. Result has 332 places, 467 transitions, 7795 flow [2024-06-14 13:54:01,219 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=6959, PETRI_DIFFERENCE_MINUEND_PLACES=324, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=453, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=257, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=196, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7795, PETRI_PLACES=332, PETRI_TRANSITIONS=467} [2024-06-14 13:54:01,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-14 13:54:01,219 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 467 transitions, 7795 flow [2024-06-14 13:54:01,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:01,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:01,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:01,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-14 13:54:01,219 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)] === [2024-06-14 13:54:01,220 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:01,220 INFO L85 PathProgramCache]: Analyzing trace with hash 248395121, now seen corresponding path program 3 times [2024-06-14 13:54:01,220 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:01,220 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584271201] [2024-06-14 13:54:01,220 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:01,220 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:01,227 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:01,563 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:01,563 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:01,563 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584271201] [2024-06-14 13:54:01,563 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584271201] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:01,563 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:01,563 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:01,563 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1951010862] [2024-06-14 13:54:01,564 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:01,564 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:01,564 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:01,564 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:01,564 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:01,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:01,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 332 places, 467 transitions, 7795 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:01,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:01,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:01,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:02,401 INFO L124 PetriNetUnfolderBase]: 2563/4280 cut-off events. [2024-06-14 13:54:02,401 INFO L125 PetriNetUnfolderBase]: For 476696/476696 co-relation queries the response was YES. [2024-06-14 13:54:02,445 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35886 conditions, 4280 events. 2563/4280 cut-off events. For 476696/476696 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 27102 event pairs, 492 based on Foata normal form. 1/4273 useless extension candidates. Maximal degree in co-relation 35732. Up to 3675 conditions per place. [2024-06-14 13:54:02,461 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 365 selfloop transitions, 122 changer transitions 0/493 dead transitions. [2024-06-14 13:54:02,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 493 transitions, 9256 flow [2024-06-14 13:54:02,462 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:02,462 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:02,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:54:02,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:54:02,462 INFO L175 Difference]: Start difference. First operand has 332 places, 467 transitions, 7795 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:54:02,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 493 transitions, 9256 flow [2024-06-14 13:54:04,093 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 493 transitions, 8758 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-14 13:54:04,099 INFO L231 Difference]: Finished difference. Result has 337 places, 473 transitions, 7646 flow [2024-06-14 13:54:04,100 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7303, PETRI_DIFFERENCE_MINUEND_PLACES=329, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=467, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=116, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=351, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7646, PETRI_PLACES=337, PETRI_TRANSITIONS=473} [2024-06-14 13:54:04,100 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-14 13:54:04,100 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 473 transitions, 7646 flow [2024-06-14 13:54:04,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:04,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:04,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:04,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-14 13:54:04,100 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)] === [2024-06-14 13:54:04,101 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:04,101 INFO L85 PathProgramCache]: Analyzing trace with hash -57450733, now seen corresponding path program 12 times [2024-06-14 13:54:04,101 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:04,101 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [108329891] [2024-06-14 13:54:04,101 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:04,101 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:04,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:04,413 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:04,413 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:04,413 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [108329891] [2024-06-14 13:54:04,414 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [108329891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:04,414 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:04,414 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:04,414 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [449439381] [2024-06-14 13:54:04,414 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:04,414 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:04,414 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:04,414 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:04,414 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:04,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:04,465 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 337 places, 473 transitions, 7646 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:04,465 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:04,465 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:04,465 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:05,264 INFO L124 PetriNetUnfolderBase]: 2560/4274 cut-off events. [2024-06-14 13:54:05,264 INFO L125 PetriNetUnfolderBase]: For 481696/481696 co-relation queries the response was YES. [2024-06-14 13:54:05,306 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35364 conditions, 4274 events. 2560/4274 cut-off events. For 481696/481696 co-relation queries the response was YES. Maximal size of possible extension queue 336. Compared 27067 event pairs, 506 based on Foata normal form. 1/4261 useless extension candidates. Maximal degree in co-relation 35209. Up to 3558 conditions per place. [2024-06-14 13:54:05,323 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 310 selfloop transitions, 181 changer transitions 0/497 dead transitions. [2024-06-14 13:54:05,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 497 transitions, 9372 flow [2024-06-14 13:54:05,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:05,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:05,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-14 13:54:05,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-14 13:54:05,324 INFO L175 Difference]: Start difference. First operand has 337 places, 473 transitions, 7646 flow. Second operand 10 states and 218 transitions. [2024-06-14 13:54:05,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 497 transitions, 9372 flow [2024-06-14 13:54:07,328 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 497 transitions, 9170 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-14 13:54:07,335 INFO L231 Difference]: Finished difference. Result has 343 places, 473 transitions, 7812 flow [2024-06-14 13:54:07,335 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7444, PETRI_DIFFERENCE_MINUEND_PLACES=333, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=181, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=292, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7812, PETRI_PLACES=343, PETRI_TRANSITIONS=473} [2024-06-14 13:54:07,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-14 13:54:07,335 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 473 transitions, 7812 flow [2024-06-14 13:54:07,335 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:07,336 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:07,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:07,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-14 13:54:07,336 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)] === [2024-06-14 13:54:07,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:07,336 INFO L85 PathProgramCache]: Analyzing trace with hash -53720317, now seen corresponding path program 9 times [2024-06-14 13:54:07,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:07,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26269863] [2024-06-14 13:54:07,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:07,336 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:07,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:07,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:07,646 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:07,646 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26269863] [2024-06-14 13:54:07,646 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26269863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:07,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:07,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:07,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824850659] [2024-06-14 13:54:07,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:07,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:07,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:07,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:07,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:07,701 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:07,701 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 343 places, 473 transitions, 7812 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:07,701 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:07,701 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:07,701 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:08,600 INFO L124 PetriNetUnfolderBase]: 2565/4282 cut-off events. [2024-06-14 13:54:08,600 INFO L125 PetriNetUnfolderBase]: For 493959/493959 co-relation queries the response was YES. [2024-06-14 13:54:08,644 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35717 conditions, 4282 events. 2565/4282 cut-off events. For 493959/493959 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 27116 event pairs, 493 based on Foata normal form. 1/4275 useless extension candidates. Maximal degree in co-relation 35560. Up to 3665 conditions per place. [2024-06-14 13:54:08,660 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 359 selfloop transitions, 134 changer transitions 0/499 dead transitions. [2024-06-14 13:54:08,661 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 499 transitions, 9431 flow [2024-06-14 13:54:08,661 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:08,662 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:08,662 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-14 13:54:08,662 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-14 13:54:08,662 INFO L175 Difference]: Start difference. First operand has 343 places, 473 transitions, 7812 flow. Second operand 10 states and 216 transitions. [2024-06-14 13:54:08,663 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 499 transitions, 9431 flow [2024-06-14 13:54:10,637 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 499 transitions, 9029 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:10,645 INFO L231 Difference]: Finished difference. Result has 346 places, 476 transitions, 7741 flow [2024-06-14 13:54:10,645 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7410, PETRI_DIFFERENCE_MINUEND_PLACES=336, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=473, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=131, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=342, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7741, PETRI_PLACES=346, PETRI_TRANSITIONS=476} [2024-06-14 13:54:10,646 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 13:54:10,646 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 476 transitions, 7741 flow [2024-06-14 13:54:10,646 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:10,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:10,646 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:10,647 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-14 13:54:10,647 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)] === [2024-06-14 13:54:10,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:10,647 INFO L85 PathProgramCache]: Analyzing trace with hash -53518507, now seen corresponding path program 10 times [2024-06-14 13:54:10,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:10,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1111134001] [2024-06-14 13:54:10,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:10,648 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:10,655 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:10,970 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:10,971 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:10,971 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1111134001] [2024-06-14 13:54:10,971 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1111134001] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:10,971 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:10,971 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:10,971 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [520317357] [2024-06-14 13:54:10,971 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:10,971 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:10,972 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:10,972 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:10,972 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:11,022 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:11,022 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 476 transitions, 7741 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:11,022 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:11,022 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:11,022 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:11,961 INFO L124 PetriNetUnfolderBase]: 2562/4276 cut-off events. [2024-06-14 13:54:11,961 INFO L125 PetriNetUnfolderBase]: For 499338/499338 co-relation queries the response was YES. [2024-06-14 13:54:12,008 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35541 conditions, 4276 events. 2562/4276 cut-off events. For 499338/499338 co-relation queries the response was YES. Maximal size of possible extension queue 334. Compared 27047 event pairs, 493 based on Foata normal form. 1/4269 useless extension candidates. Maximal degree in co-relation 35383. Up to 3671 conditions per place. [2024-06-14 13:54:12,028 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 363 selfloop transitions, 127 changer transitions 0/496 dead transitions. [2024-06-14 13:54:12,028 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 496 transitions, 9121 flow [2024-06-14 13:54:12,029 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:12,029 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:12,029 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:54:12,029 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:54:12,030 INFO L175 Difference]: Start difference. First operand has 346 places, 476 transitions, 7741 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:54:12,030 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 496 transitions, 9121 flow [2024-06-14 13:54:13,985 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 496 transitions, 8805 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-14 13:54:13,992 INFO L231 Difference]: Finished difference. Result has 346 places, 476 transitions, 7685 flow [2024-06-14 13:54:13,992 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7425, PETRI_DIFFERENCE_MINUEND_PLACES=338, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=127, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=349, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7685, PETRI_PLACES=346, PETRI_TRANSITIONS=476} [2024-06-14 13:54:13,992 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-14 13:54:13,992 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 476 transitions, 7685 flow [2024-06-14 13:54:13,992 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:13,992 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:13,993 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:13,993 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-14 13:54:13,993 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)] === [2024-06-14 13:54:13,993 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:13,993 INFO L85 PathProgramCache]: Analyzing trace with hash -57450547, now seen corresponding path program 11 times [2024-06-14 13:54:13,993 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:13,993 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [291478733] [2024-06-14 13:54:13,993 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:13,993 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:14,000 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:14,287 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:14,287 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:14,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [291478733] [2024-06-14 13:54:14,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [291478733] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:14,287 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:14,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:14,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202264316] [2024-06-14 13:54:14,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:14,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:14,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:14,288 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:14,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:14,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:14,332 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 346 places, 476 transitions, 7685 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:14,332 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:14,332 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:14,332 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:15,125 INFO L124 PetriNetUnfolderBase]: 2567/4268 cut-off events. [2024-06-14 13:54:15,125 INFO L125 PetriNetUnfolderBase]: For 510157/510157 co-relation queries the response was YES. [2024-06-14 13:54:15,167 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35634 conditions, 4268 events. 2567/4268 cut-off events. For 510157/510157 co-relation queries the response was YES. Maximal size of possible extension queue 335. Compared 26874 event pairs, 535 based on Foata normal form. 1/4255 useless extension candidates. Maximal degree in co-relation 35475. Up to 3209 conditions per place. [2024-06-14 13:54:15,183 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 275 changer transitions 0/502 dead transitions. [2024-06-14 13:54:15,183 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 502 transitions, 9666 flow [2024-06-14 13:54:15,184 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:15,184 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:15,184 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 13:54:15,184 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 13:54:15,184 INFO L175 Difference]: Start difference. First operand has 346 places, 476 transitions, 7685 flow. Second operand 8 states and 189 transitions. [2024-06-14 13:54:15,184 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 502 transitions, 9666 flow [2024-06-14 13:54:17,305 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 502 transitions, 9402 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:17,312 INFO L231 Difference]: Finished difference. Result has 347 places, 479 transitions, 8022 flow [2024-06-14 13:54:17,312 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7421, PETRI_DIFFERENCE_MINUEND_PLACES=339, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=476, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=272, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8022, PETRI_PLACES=347, PETRI_TRANSITIONS=479} [2024-06-14 13:54:17,313 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-14 13:54:17,313 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 479 transitions, 8022 flow [2024-06-14 13:54:17,313 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:17,313 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:17,313 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:17,314 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-14 13:54:17,314 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)] === [2024-06-14 13:54:17,314 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:17,314 INFO L85 PathProgramCache]: Analyzing trace with hash -919138635, now seen corresponding path program 4 times [2024-06-14 13:54:17,314 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:17,314 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [790412654] [2024-06-14 13:54:17,314 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:17,315 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:17,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:17,666 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:17,667 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:17,667 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [790412654] [2024-06-14 13:54:17,667 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [790412654] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:17,667 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:17,667 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:17,667 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1490160475] [2024-06-14 13:54:17,667 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:17,668 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:17,668 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:17,668 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:17,668 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:17,698 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:17,698 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 347 places, 479 transitions, 8022 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:17,698 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:17,698 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:17,698 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:18,543 INFO L124 PetriNetUnfolderBase]: 2580/4308 cut-off events. [2024-06-14 13:54:18,544 INFO L125 PetriNetUnfolderBase]: For 527443/527443 co-relation queries the response was YES. [2024-06-14 13:54:18,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36447 conditions, 4308 events. 2580/4308 cut-off events. For 527443/527443 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27307 event pairs, 492 based on Foata normal form. 1/4301 useless extension candidates. Maximal degree in co-relation 36287. Up to 3696 conditions per place. [2024-06-14 13:54:18,604 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 371 selfloop transitions, 130 changer transitions 0/507 dead transitions. [2024-06-14 13:54:18,604 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 507 transitions, 9740 flow [2024-06-14 13:54:18,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:18,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:18,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-14 13:54:18,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:54:18,605 INFO L175 Difference]: Start difference. First operand has 347 places, 479 transitions, 8022 flow. Second operand 9 states and 198 transitions. [2024-06-14 13:54:18,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 507 transitions, 9740 flow [2024-06-14 13:54:20,913 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 507 transitions, 9221 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:54:20,920 INFO L231 Difference]: Finished difference. Result has 352 places, 485 transitions, 7893 flow [2024-06-14 13:54:20,920 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7511, PETRI_DIFFERENCE_MINUEND_PLACES=343, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=479, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=124, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=355, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7893, PETRI_PLACES=352, PETRI_TRANSITIONS=485} [2024-06-14 13:54:20,921 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-14 13:54:20,921 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 485 transitions, 7893 flow [2024-06-14 13:54:20,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:20,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:20,921 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:20,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-14 13:54:20,921 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)] === [2024-06-14 13:54:20,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:20,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1473178349, now seen corresponding path program 12 times [2024-06-14 13:54:20,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:20,921 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1850436003] [2024-06-14 13:54:20,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:20,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:20,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:21,253 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:21,254 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:21,254 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1850436003] [2024-06-14 13:54:21,254 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1850436003] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:21,254 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:21,254 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:21,255 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [925376248] [2024-06-14 13:54:21,255 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:21,255 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:21,255 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:21,255 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:21,256 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:21,312 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:21,312 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 352 places, 485 transitions, 7893 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:21,312 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:21,312 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:21,312 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:22,149 INFO L124 PetriNetUnfolderBase]: 2577/4285 cut-off events. [2024-06-14 13:54:22,150 INFO L125 PetriNetUnfolderBase]: For 532363/532363 co-relation queries the response was YES. [2024-06-14 13:54:22,193 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36039 conditions, 4285 events. 2577/4285 cut-off events. For 532363/532363 co-relation queries the response was YES. Maximal size of possible extension queue 339. Compared 27032 event pairs, 537 based on Foata normal form. 1/4272 useless extension candidates. Maximal degree in co-relation 35878. Up to 3217 conditions per place. [2024-06-14 13:54:22,209 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 281 changer transitions 0/508 dead transitions. [2024-06-14 13:54:22,209 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 508 transitions, 9861 flow [2024-06-14 13:54:22,209 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:22,209 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:22,210 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-14 13:54:22,210 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-14 13:54:22,210 INFO L175 Difference]: Start difference. First operand has 352 places, 485 transitions, 7893 flow. Second operand 8 states and 190 transitions. [2024-06-14 13:54:22,210 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 508 transitions, 9861 flow [2024-06-14 13:54:24,809 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 508 transitions, 9601 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:24,816 INFO L231 Difference]: Finished difference. Result has 355 places, 485 transitions, 8201 flow [2024-06-14 13:54:24,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7633, PETRI_DIFFERENCE_MINUEND_PLACES=347, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=281, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=204, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8201, PETRI_PLACES=355, PETRI_TRANSITIONS=485} [2024-06-14 13:54:24,817 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-14 13:54:24,817 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 485 transitions, 8201 flow [2024-06-14 13:54:24,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:24,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:24,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:24,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-14 13:54:24,817 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)] === [2024-06-14 13:54:24,820 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:24,820 INFO L85 PathProgramCache]: Analyzing trace with hash 605980113, now seen corresponding path program 5 times [2024-06-14 13:54:24,820 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:24,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1705610679] [2024-06-14 13:54:24,821 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:24,821 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:24,830 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:25,194 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:25,195 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:25,195 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1705610679] [2024-06-14 13:54:25,195 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1705610679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:25,195 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:25,195 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:25,195 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1469789249] [2024-06-14 13:54:25,195 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:25,195 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:25,195 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:25,196 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:25,196 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:25,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:25,235 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 355 places, 485 transitions, 8201 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:25,235 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:25,235 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:25,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:26,000 INFO L124 PetriNetUnfolderBase]: 2582/4316 cut-off events. [2024-06-14 13:54:26,000 INFO L125 PetriNetUnfolderBase]: For 546287/546287 co-relation queries the response was YES. [2024-06-14 13:54:26,046 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36616 conditions, 4316 events. 2582/4316 cut-off events. For 546287/546287 co-relation queries the response was YES. Maximal size of possible extension queue 343. Compared 27350 event pairs, 487 based on Foata normal form. 1/4309 useless extension candidates. Maximal degree in co-relation 36453. Up to 3698 conditions per place. [2024-06-14 13:54:26,062 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 373 selfloop transitions, 131 changer transitions 0/510 dead transitions. [2024-06-14 13:54:26,063 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 510 transitions, 9878 flow [2024-06-14 13:54:26,063 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:54:26,063 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:54:26,064 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-14 13:54:26,064 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-14 13:54:26,064 INFO L175 Difference]: Start difference. First operand has 355 places, 485 transitions, 8201 flow. Second operand 9 states and 200 transitions. [2024-06-14 13:54:26,064 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 510 transitions, 9878 flow [2024-06-14 13:54:28,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 510 transitions, 9260 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:28,595 INFO L231 Difference]: Finished difference. Result has 357 places, 488 transitions, 7916 flow [2024-06-14 13:54:28,595 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7587, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=485, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=7916, PETRI_PLACES=357, PETRI_TRANSITIONS=488} [2024-06-14 13:54:28,596 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-14 13:54:28,596 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 488 transitions, 7916 flow [2024-06-14 13:54:28,596 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:28,596 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:28,596 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:28,596 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-14 13:54:28,597 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)] === [2024-06-14 13:54:28,597 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:28,597 INFO L85 PathProgramCache]: Analyzing trace with hash -1462056851, now seen corresponding path program 1 times [2024-06-14 13:54:28,597 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:28,597 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [933861821] [2024-06-14 13:54:28,598 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:28,598 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:28,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:28,935 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:28,935 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:28,935 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [933861821] [2024-06-14 13:54:28,935 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [933861821] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:28,935 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:28,936 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:28,936 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [186288244] [2024-06-14 13:54:28,936 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:28,936 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:28,936 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:28,936 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:28,936 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:28,991 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:28,991 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 488 transitions, 7916 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:28,991 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:28,991 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:28,991 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:29,779 INFO L124 PetriNetUnfolderBase]: 2602/4356 cut-off events. [2024-06-14 13:54:29,779 INFO L125 PetriNetUnfolderBase]: For 574857/574857 co-relation queries the response was YES. [2024-06-14 13:54:29,823 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36477 conditions, 4356 events. 2602/4356 cut-off events. For 574857/574857 co-relation queries the response was YES. Maximal size of possible extension queue 346. Compared 27715 event pairs, 456 based on Foata normal form. 6/4361 useless extension candidates. Maximal degree in co-relation 36313. Up to 3782 conditions per place. [2024-06-14 13:54:29,838 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 456 selfloop transitions, 54 changer transitions 0/516 dead transitions. [2024-06-14 13:54:29,839 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 516 transitions, 9076 flow [2024-06-14 13:54:29,839 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:29,839 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:29,839 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 13:54:29,839 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:54:29,839 INFO L175 Difference]: Start difference. First operand has 357 places, 488 transitions, 7916 flow. Second operand 8 states and 176 transitions. [2024-06-14 13:54:29,839 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 516 transitions, 9076 flow [2024-06-14 13:54:32,373 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 516 transitions, 8613 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-14 13:54:32,379 INFO L231 Difference]: Finished difference. Result has 357 places, 491 transitions, 7619 flow [2024-06-14 13:54:32,379 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7453, PETRI_DIFFERENCE_MINUEND_PLACES=348, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=488, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=52, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=435, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7619, PETRI_PLACES=357, PETRI_TRANSITIONS=491} [2024-06-14 13:54:32,380 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-14 13:54:32,380 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 491 transitions, 7619 flow [2024-06-14 13:54:32,380 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:32,380 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:32,380 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:32,380 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-14 13:54:32,380 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)] === [2024-06-14 13:54:32,380 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:32,381 INFO L85 PathProgramCache]: Analyzing trace with hash -1526655861, now seen corresponding path program 7 times [2024-06-14 13:54:32,381 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:32,381 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [556923451] [2024-06-14 13:54:32,381 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:32,381 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:32,387 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:32,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:32,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:32,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [556923451] [2024-06-14 13:54:32,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [556923451] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:32,707 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:32,707 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:32,707 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [388632651] [2024-06-14 13:54:32,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:32,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:32,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:32,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:32,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:32,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:32,756 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 357 places, 491 transitions, 7619 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:32,756 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:32,756 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:32,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:33,579 INFO L124 PetriNetUnfolderBase]: 2630/4400 cut-off events. [2024-06-14 13:54:33,579 INFO L125 PetriNetUnfolderBase]: For 592958/592958 co-relation queries the response was YES. [2024-06-14 13:54:33,628 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36636 conditions, 4400 events. 2630/4400 cut-off events. For 592958/592958 co-relation queries the response was YES. Maximal size of possible extension queue 351. Compared 28052 event pairs, 466 based on Foata normal form. 8/4407 useless extension candidates. Maximal degree in co-relation 36472. Up to 3941 conditions per place. [2024-06-14 13:54:33,644 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 474 selfloop transitions, 33 changer transitions 0/513 dead transitions. [2024-06-14 13:54:33,644 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 513 transitions, 8735 flow [2024-06-14 13:54:33,645 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:54:33,645 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:54:33,645 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-14 13:54:33,645 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-14 13:54:33,645 INFO L175 Difference]: Start difference. First operand has 357 places, 491 transitions, 7619 flow. Second operand 7 states and 156 transitions. [2024-06-14 13:54:33,645 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 513 transitions, 8735 flow [2024-06-14 13:54:36,436 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 513 transitions, 8655 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:54:36,442 INFO L231 Difference]: Finished difference. Result has 360 places, 492 transitions, 7636 flow [2024-06-14 13:54:36,442 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7539, PETRI_DIFFERENCE_MINUEND_PLACES=353, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=491, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=32, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=458, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7636, PETRI_PLACES=360, PETRI_TRANSITIONS=492} [2024-06-14 13:54:36,442 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-14 13:54:36,443 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 492 transitions, 7636 flow [2024-06-14 13:54:36,443 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:36,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:36,443 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:36,443 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-14 13:54:36,443 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)] === [2024-06-14 13:54:36,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:36,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1537697751, now seen corresponding path program 8 times [2024-06-14 13:54:36,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:36,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1455532135] [2024-06-14 13:54:36,444 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:36,444 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:36,451 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:36,776 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:36,776 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:36,776 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1455532135] [2024-06-14 13:54:36,776 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1455532135] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:36,776 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:36,776 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:36,776 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1448936282] [2024-06-14 13:54:36,777 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:36,777 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:36,777 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:36,777 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:36,777 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:36,844 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:36,844 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 360 places, 492 transitions, 7636 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:36,844 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:36,844 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:36,845 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:37,805 INFO L124 PetriNetUnfolderBase]: 2645/4429 cut-off events. [2024-06-14 13:54:37,805 INFO L125 PetriNetUnfolderBase]: For 595881/595881 co-relation queries the response was YES. [2024-06-14 13:54:37,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36787 conditions, 4429 events. 2645/4429 cut-off events. For 595881/595881 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 28270 event pairs, 471 based on Foata normal form. 8/4436 useless extension candidates. Maximal degree in co-relation 36621. Up to 3966 conditions per place. [2024-06-14 13:54:37,863 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 479 selfloop transitions, 35 changer transitions 0/520 dead transitions. [2024-06-14 13:54:37,863 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 520 transitions, 8784 flow [2024-06-14 13:54:37,863 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:54:37,863 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:54:37,864 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 13:54:37,864 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-14 13:54:37,864 INFO L175 Difference]: Start difference. First operand has 360 places, 492 transitions, 7636 flow. Second operand 7 states and 162 transitions. [2024-06-14 13:54:37,864 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 520 transitions, 8784 flow [2024-06-14 13:54:40,690 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 520 transitions, 8705 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:40,696 INFO L231 Difference]: Finished difference. Result has 362 places, 493 transitions, 7660 flow [2024-06-14 13:54:40,697 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7557, PETRI_DIFFERENCE_MINUEND_PLACES=355, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=492, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=457, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7660, PETRI_PLACES=362, PETRI_TRANSITIONS=493} [2024-06-14 13:54:40,697 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-14 13:54:40,697 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 493 transitions, 7660 flow [2024-06-14 13:54:40,697 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:40,697 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:40,697 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:40,697 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-14 13:54:40,697 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)] === [2024-06-14 13:54:40,697 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:40,698 INFO L85 PathProgramCache]: Analyzing trace with hash 2087286543, now seen corresponding path program 9 times [2024-06-14 13:54:40,698 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:40,698 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [498116091] [2024-06-14 13:54:40,698 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:40,698 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:40,704 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:41,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:41,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:41,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [498116091] [2024-06-14 13:54:41,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [498116091] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:41,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:41,036 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:41,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1881397070] [2024-06-14 13:54:41,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:41,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:41,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:41,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:41,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:41,089 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:41,090 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 362 places, 493 transitions, 7660 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:41,090 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:41,090 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:41,090 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:41,918 INFO L124 PetriNetUnfolderBase]: 2632/4410 cut-off events. [2024-06-14 13:54:41,918 INFO L125 PetriNetUnfolderBase]: For 570147/570147 co-relation queries the response was YES. [2024-06-14 13:54:41,965 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36119 conditions, 4410 events. 2632/4410 cut-off events. For 570147/570147 co-relation queries the response was YES. Maximal size of possible extension queue 354. Compared 28122 event pairs, 382 based on Foata normal form. 6/4415 useless extension candidates. Maximal degree in co-relation 35952. Up to 3823 conditions per place. [2024-06-14 13:54:41,982 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 479 selfloop transitions, 41 changer transitions 0/526 dead transitions. [2024-06-14 13:54:41,982 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 526 transitions, 8820 flow [2024-06-14 13:54:41,983 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:54:41,983 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:54:41,983 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-14 13:54:41,983 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-14 13:54:41,983 INFO L175 Difference]: Start difference. First operand has 362 places, 493 transitions, 7660 flow. Second operand 7 states and 168 transitions. [2024-06-14 13:54:41,983 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 526 transitions, 8820 flow [2024-06-14 13:54:44,856 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 526 transitions, 8735 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:54:44,862 INFO L231 Difference]: Finished difference. Result has 364 places, 493 transitions, 7661 flow [2024-06-14 13:54:44,862 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7575, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=41, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=452, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7661, PETRI_PLACES=364, PETRI_TRANSITIONS=493} [2024-06-14 13:54:44,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-14 13:54:44,862 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 493 transitions, 7661 flow [2024-06-14 13:54:44,862 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:44,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:44,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:44,862 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-14 13:54:44,863 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)] === [2024-06-14 13:54:44,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:44,863 INFO L85 PathProgramCache]: Analyzing trace with hash 280982325, now seen corresponding path program 6 times [2024-06-14 13:54:44,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:44,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [305523716] [2024-06-14 13:54:44,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:44,863 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:44,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:45,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:45,179 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:45,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [305523716] [2024-06-14 13:54:45,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [305523716] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:45,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:45,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:45,180 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1487620833] [2024-06-14 13:54:45,180 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:45,180 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:45,180 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:45,180 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:45,180 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:45,223 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:45,223 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 493 transitions, 7661 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:45,223 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:45,223 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:45,223 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:46,044 INFO L124 PetriNetUnfolderBase]: 2637/4423 cut-off events. [2024-06-14 13:54:46,044 INFO L125 PetriNetUnfolderBase]: For 561038/561055 co-relation queries the response was YES. [2024-06-14 13:54:46,090 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36231 conditions, 4423 events. 2637/4423 cut-off events. For 561038/561055 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 28312 event pairs, 512 based on Foata normal form. 13/4430 useless extension candidates. Maximal degree in co-relation 36063. Up to 3786 conditions per place. [2024-06-14 13:54:46,107 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 379 selfloop transitions, 128 changer transitions 0/513 dead transitions. [2024-06-14 13:54:46,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 513 transitions, 9346 flow [2024-06-14 13:54:46,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:54:46,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:54:46,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-14 13:54:46,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-14 13:54:46,108 INFO L175 Difference]: Start difference. First operand has 364 places, 493 transitions, 7661 flow. Second operand 7 states and 159 transitions. [2024-06-14 13:54:46,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 513 transitions, 9346 flow [2024-06-14 13:54:48,544 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 513 transitions, 9214 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:48,550 INFO L231 Difference]: Finished difference. Result has 365 places, 496 transitions, 7840 flow [2024-06-14 13:54:48,550 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7529, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=493, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=125, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7840, PETRI_PLACES=365, PETRI_TRANSITIONS=496} [2024-06-14 13:54:48,550 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-14 13:54:48,550 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 496 transitions, 7840 flow [2024-06-14 13:54:48,550 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:48,550 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:48,550 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:48,551 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-14 13:54:48,551 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)] === [2024-06-14 13:54:48,551 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:48,551 INFO L85 PathProgramCache]: Analyzing trace with hash -209012735, now seen corresponding path program 13 times [2024-06-14 13:54:48,551 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:48,551 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [911440311] [2024-06-14 13:54:48,551 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:48,551 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:48,560 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:48,956 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:48,957 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:48,957 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [911440311] [2024-06-14 13:54:48,957 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [911440311] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:48,957 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:48,957 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:48,957 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1303388412] [2024-06-14 13:54:48,958 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:48,958 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:48,958 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:48,958 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:48,958 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:49,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:49,004 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 365 places, 496 transitions, 7840 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:49,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:49,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:49,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:49,878 INFO L124 PetriNetUnfolderBase]: 2634/4419 cut-off events. [2024-06-14 13:54:49,878 INFO L125 PetriNetUnfolderBase]: For 566195/566212 co-relation queries the response was YES. [2024-06-14 13:54:49,923 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36242 conditions, 4419 events. 2634/4419 cut-off events. For 566195/566212 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 28301 event pairs, 495 based on Foata normal form. 13/4426 useless extension candidates. Maximal degree in co-relation 36073. Up to 3721 conditions per place. [2024-06-14 13:54:49,938 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 357 selfloop transitions, 160 changer transitions 0/523 dead transitions. [2024-06-14 13:54:49,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 523 transitions, 9136 flow [2024-06-14 13:54:49,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:54:49,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:54:49,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-14 13:54:49,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292682926829269 [2024-06-14 13:54:49,939 INFO L175 Difference]: Start difference. First operand has 365 places, 496 transitions, 7840 flow. Second operand 10 states and 217 transitions. [2024-06-14 13:54:49,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 523 transitions, 9136 flow [2024-06-14 13:54:52,923 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 523 transitions, 8750 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:54:52,929 INFO L231 Difference]: Finished difference. Result has 369 places, 496 transitions, 7780 flow [2024-06-14 13:54:52,929 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7454, PETRI_DIFFERENCE_MINUEND_PLACES=359, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=160, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=336, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=7780, PETRI_PLACES=369, PETRI_TRANSITIONS=496} [2024-06-14 13:54:52,930 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-14 13:54:52,930 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 496 transitions, 7780 flow [2024-06-14 13:54:52,930 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:52,930 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:52,930 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:52,930 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-14 13:54:52,930 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)] === [2024-06-14 13:54:52,930 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:52,930 INFO L85 PathProgramCache]: Analyzing trace with hash 1941848889, now seen corresponding path program 13 times [2024-06-14 13:54:52,931 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:52,931 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1075853040] [2024-06-14 13:54:52,931 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:52,931 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:52,937 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:53,269 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:53,269 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:53,269 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1075853040] [2024-06-14 13:54:53,269 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1075853040] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:53,269 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:53,270 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:53,270 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [766866858] [2024-06-14 13:54:53,270 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:53,270 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:53,270 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:53,270 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:53,271 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:53,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:53,320 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 496 transitions, 7780 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:53,320 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:53,320 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:53,320 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:54,134 INFO L124 PetriNetUnfolderBase]: 2644/4422 cut-off events. [2024-06-14 13:54:54,135 INFO L125 PetriNetUnfolderBase]: For 579619/579619 co-relation queries the response was YES. [2024-06-14 13:54:54,183 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36360 conditions, 4422 events. 2644/4422 cut-off events. For 579619/579619 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 28284 event pairs, 504 based on Foata normal form. 2/4416 useless extension candidates. Maximal degree in co-relation 36191. Up to 3425 conditions per place. [2024-06-14 13:54:54,199 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 252 selfloop transitions, 275 changer transitions 0/533 dead transitions. [2024-06-14 13:54:54,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 533 transitions, 9807 flow [2024-06-14 13:54:54,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:54:54,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:54:54,200 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 13:54:54,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-14 13:54:54,201 INFO L175 Difference]: Start difference. First operand has 369 places, 496 transitions, 7780 flow. Second operand 8 states and 197 transitions. [2024-06-14 13:54:54,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 533 transitions, 9807 flow [2024-06-14 13:54:57,486 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 533 transitions, 9491 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 13:54:57,492 INFO L231 Difference]: Finished difference. Result has 371 places, 502 transitions, 8232 flow [2024-06-14 13:54:57,492 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7464, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=496, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=269, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=221, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8232, PETRI_PLACES=371, PETRI_TRANSITIONS=502} [2024-06-14 13:54:57,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-14 13:54:57,493 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 502 transitions, 8232 flow [2024-06-14 13:54:57,493 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:57,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:54:57,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:54:57,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-14 13:54:57,493 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)] === [2024-06-14 13:54:57,493 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:54:57,493 INFO L85 PathProgramCache]: Analyzing trace with hash 2074018319, now seen corresponding path program 7 times [2024-06-14 13:54:57,493 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:54:57,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1232338534] [2024-06-14 13:54:57,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:54:57,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:54:57,502 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:54:57,833 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:54:57,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:54:57,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1232338534] [2024-06-14 13:54:57,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1232338534] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:54:57,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:54:57,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:54:57,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [165065141] [2024-06-14 13:54:57,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:54:57,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:54:57,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:54:57,834 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:54:57,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:54:57,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:54:57,863 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 502 transitions, 8232 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:54:57,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:54:57,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:54:57,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:54:58,701 INFO L124 PetriNetUnfolderBase]: 2641/4433 cut-off events. [2024-06-14 13:54:58,701 INFO L125 PetriNetUnfolderBase]: For 585685/585702 co-relation queries the response was YES. [2024-06-14 13:54:58,750 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36833 conditions, 4433 events. 2641/4433 cut-off events. For 585685/585702 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 28448 event pairs, 514 based on Foata normal form. 13/4440 useless extension candidates. Maximal degree in co-relation 36662. Up to 3793 conditions per place. [2024-06-14 13:54:58,766 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 384 selfloop transitions, 128 changer transitions 0/518 dead transitions. [2024-06-14 13:54:58,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 518 transitions, 9694 flow [2024-06-14 13:54:58,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:54:58,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:54:58,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 13:54:58,768 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 13:54:58,768 INFO L175 Difference]: Start difference. First operand has 371 places, 502 transitions, 8232 flow. Second operand 7 states and 157 transitions. [2024-06-14 13:54:58,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 518 transitions, 9694 flow [2024-06-14 13:55:01,559 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 518 transitions, 9128 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-14 13:55:01,566 INFO L231 Difference]: Finished difference. Result has 370 places, 502 transitions, 7936 flow [2024-06-14 13:55:01,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7674, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=128, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=374, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7936, PETRI_PLACES=370, PETRI_TRANSITIONS=502} [2024-06-14 13:55:01,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-14 13:55:01,566 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 502 transitions, 7936 flow [2024-06-14 13:55:01,567 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:01,567 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:01,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:01,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-14 13:55:01,567 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)] === [2024-06-14 13:55:01,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:01,568 INFO L85 PathProgramCache]: Analyzing trace with hash 1941848703, now seen corresponding path program 14 times [2024-06-14 13:55:01,568 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:01,568 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308135583] [2024-06-14 13:55:01,568 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:01,568 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:01,577 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:01,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:01,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:01,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308135583] [2024-06-14 13:55:01,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308135583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:01,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:01,917 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:01,917 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275382858] [2024-06-14 13:55:01,917 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:01,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:01,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:01,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:01,918 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:01,963 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:01,963 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 502 transitions, 7936 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:01,964 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:01,964 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:01,964 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:02,830 INFO L124 PetriNetUnfolderBase]: 2638/4416 cut-off events. [2024-06-14 13:55:02,831 INFO L125 PetriNetUnfolderBase]: For 565371/565371 co-relation queries the response was YES. [2024-06-14 13:55:02,878 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36207 conditions, 4416 events. 2638/4416 cut-off events. For 565371/565371 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 28224 event pairs, 487 based on Foata normal form. 1/4409 useless extension candidates. Maximal degree in co-relation 36036. Up to 3728 conditions per place. [2024-06-14 13:55:02,895 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 365 selfloop transitions, 159 changer transitions 0/530 dead transitions. [2024-06-14 13:55:02,896 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 530 transitions, 9252 flow [2024-06-14 13:55:02,896 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:02,896 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:02,896 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-14 13:55:02,896 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-14 13:55:02,896 INFO L175 Difference]: Start difference. First operand has 370 places, 502 transitions, 7936 flow. Second operand 8 states and 188 transitions. [2024-06-14 13:55:02,897 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 530 transitions, 9252 flow [2024-06-14 13:55:05,941 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 530 transitions, 8984 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:05,947 INFO L231 Difference]: Finished difference. Result has 372 places, 502 transitions, 7996 flow [2024-06-14 13:55:05,947 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7668, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=159, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=343, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=7996, PETRI_PLACES=372, PETRI_TRANSITIONS=502} [2024-06-14 13:55:05,948 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-14 13:55:05,948 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 502 transitions, 7996 flow [2024-06-14 13:55:05,948 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:05,948 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:05,948 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:05,948 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-14 13:55:05,948 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)] === [2024-06-14 13:55:05,948 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:05,948 INFO L85 PathProgramCache]: Analyzing trace with hash -2028913539, now seen corresponding path program 14 times [2024-06-14 13:55:05,949 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:05,949 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [944327735] [2024-06-14 13:55:05,949 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:05,949 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:05,957 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:06,272 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:06,272 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:06,272 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [944327735] [2024-06-14 13:55:06,272 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [944327735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:06,272 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:06,272 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:06,272 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1199510592] [2024-06-14 13:55:06,272 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:06,273 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:06,273 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:06,273 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:06,273 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:06,323 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:06,323 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 372 places, 502 transitions, 7996 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:06,323 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:06,323 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:06,324 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:07,260 INFO L124 PetriNetUnfolderBase]: 2632/4406 cut-off events. [2024-06-14 13:55:07,260 INFO L125 PetriNetUnfolderBase]: For 571638/571638 co-relation queries the response was YES. [2024-06-14 13:55:07,303 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36185 conditions, 4406 events. 2632/4406 cut-off events. For 571638/571638 co-relation queries the response was YES. Maximal size of possible extension queue 356. Compared 28113 event pairs, 504 based on Foata normal form. 2/4400 useless extension candidates. Maximal degree in co-relation 36013. Up to 3416 conditions per place. [2024-06-14 13:55:07,318 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 251 selfloop transitions, 279 changer transitions 0/536 dead transitions. [2024-06-14 13:55:07,318 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 536 transitions, 10138 flow [2024-06-14 13:55:07,319 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:55:07,319 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:55:07,319 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-14 13:55:07,319 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829268292682926 [2024-06-14 13:55:07,319 INFO L175 Difference]: Start difference. First operand has 372 places, 502 transitions, 7996 flow. Second operand 10 states and 239 transitions. [2024-06-14 13:55:07,319 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 536 transitions, 10138 flow [2024-06-14 13:55:10,650 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 536 transitions, 9840 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:10,659 INFO L231 Difference]: Finished difference. Result has 376 places, 502 transitions, 8285 flow [2024-06-14 13:55:10,659 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7708, PETRI_DIFFERENCE_MINUEND_PLACES=366, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=279, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=223, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8285, PETRI_PLACES=376, PETRI_TRANSITIONS=502} [2024-06-14 13:55:10,659 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-14 13:55:10,660 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 502 transitions, 8285 flow [2024-06-14 13:55:10,660 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:10,660 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:10,660 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:10,660 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-14 13:55:10,660 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)] === [2024-06-14 13:55:10,661 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:10,661 INFO L85 PathProgramCache]: Analyzing trace with hash -1878109283, now seen corresponding path program 15 times [2024-06-14 13:55:10,661 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:10,661 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [812908532] [2024-06-14 13:55:10,661 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:10,661 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:10,670 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:11,057 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:11,058 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:11,058 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [812908532] [2024-06-14 13:55:11,058 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [812908532] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:11,058 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:11,058 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:11,058 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1151255499] [2024-06-14 13:55:11,058 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:11,058 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:11,058 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:11,058 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:11,059 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:11,116 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:11,116 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 376 places, 502 transitions, 8285 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:11,116 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:11,116 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:11,116 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:12,013 INFO L124 PetriNetUnfolderBase]: 2629/4407 cut-off events. [2024-06-14 13:55:12,013 INFO L125 PetriNetUnfolderBase]: For 563241/563241 co-relation queries the response was YES. [2024-06-14 13:55:12,061 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36410 conditions, 4407 events. 2629/4407 cut-off events. For 563241/563241 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 28210 event pairs, 484 based on Foata normal form. 1/4400 useless extension candidates. Maximal degree in co-relation 36237. Up to 3717 conditions per place. [2024-06-14 13:55:12,079 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 366 selfloop transitions, 162 changer transitions 0/534 dead transitions. [2024-06-14 13:55:12,079 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 534 transitions, 9819 flow [2024-06-14 13:55:12,079 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:55:12,079 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:55:12,080 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-14 13:55:12,080 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:55:12,080 INFO L175 Difference]: Start difference. First operand has 376 places, 502 transitions, 8285 flow. Second operand 11 states and 242 transitions. [2024-06-14 13:55:12,080 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 534 transitions, 9819 flow [2024-06-14 13:55:14,940 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 534 transitions, 9018 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-06-14 13:55:14,946 INFO L231 Difference]: Finished difference. Result has 373 places, 502 transitions, 7834 flow [2024-06-14 13:55:14,946 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7496, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7834, PETRI_PLACES=373, PETRI_TRANSITIONS=502} [2024-06-14 13:55:14,947 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-14 13:55:14,947 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 502 transitions, 7834 flow [2024-06-14 13:55:14,947 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:14,947 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:14,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:14,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-14 13:55:14,947 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)] === [2024-06-14 13:55:14,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:14,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1564666245, now seen corresponding path program 8 times [2024-06-14 13:55:14,948 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:14,948 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425196562] [2024-06-14 13:55:14,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:14,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:14,954 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:15,289 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:15,290 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:15,290 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425196562] [2024-06-14 13:55:15,290 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425196562] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:15,290 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:15,290 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:15,290 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2009235478] [2024-06-14 13:55:15,290 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:15,290 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:15,290 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:15,290 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:15,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:15,319 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:15,319 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 373 places, 502 transitions, 7834 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:15,319 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:15,319 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:15,319 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:16,157 INFO L124 PetriNetUnfolderBase]: 2626/4403 cut-off events. [2024-06-14 13:55:16,157 INFO L125 PetriNetUnfolderBase]: For 535506/535506 co-relation queries the response was YES. [2024-06-14 13:55:16,206 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35423 conditions, 4403 events. 2626/4403 cut-off events. For 535506/535506 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 28178 event pairs, 494 based on Foata normal form. 1/4396 useless extension candidates. Maximal degree in co-relation 35253. Up to 3774 conditions per place. [2024-06-14 13:55:16,223 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 382 selfloop transitions, 134 changer transitions 0/522 dead transitions. [2024-06-14 13:55:16,224 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 522 transitions, 9502 flow [2024-06-14 13:55:16,224 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:55:16,224 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:55:16,225 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:55:16,225 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:55:16,225 INFO L175 Difference]: Start difference. First operand has 373 places, 502 transitions, 7834 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:55:16,225 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 522 transitions, 9502 flow [2024-06-14 13:55:18,735 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 522 transitions, 9158 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-14 13:55:18,741 INFO L231 Difference]: Finished difference. Result has 370 places, 502 transitions, 7784 flow [2024-06-14 13:55:18,741 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7502, PETRI_DIFFERENCE_MINUEND_PLACES=363, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=134, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=368, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7784, PETRI_PLACES=370, PETRI_TRANSITIONS=502} [2024-06-14 13:55:18,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-14 13:55:18,741 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 502 transitions, 7784 flow [2024-06-14 13:55:18,742 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:18,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:18,742 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:18,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-14 13:55:18,742 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)] === [2024-06-14 13:55:18,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:18,742 INFO L85 PathProgramCache]: Analyzing trace with hash -1564672197, now seen corresponding path program 16 times [2024-06-14 13:55:18,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:18,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851990576] [2024-06-14 13:55:18,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:18,742 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:18,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:19,067 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:19,068 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:19,068 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851990576] [2024-06-14 13:55:19,068 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851990576] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:19,068 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:19,068 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:19,068 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1467681519] [2024-06-14 13:55:19,068 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:19,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:19,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:19,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:19,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:19,114 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:19,115 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 370 places, 502 transitions, 7784 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:19,115 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:19,115 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:19,115 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:19,980 INFO L124 PetriNetUnfolderBase]: 2623/4399 cut-off events. [2024-06-14 13:55:19,981 INFO L125 PetriNetUnfolderBase]: For 520541/520541 co-relation queries the response was YES. [2024-06-14 13:55:20,028 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35095 conditions, 4399 events. 2623/4399 cut-off events. For 520541/520541 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 28183 event pairs, 484 based on Foata normal form. 1/4392 useless extension candidates. Maximal degree in co-relation 34926. Up to 3710 conditions per place. [2024-06-14 13:55:20,044 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 367 selfloop transitions, 162 changer transitions 0/535 dead transitions. [2024-06-14 13:55:20,044 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 535 transitions, 9116 flow [2024-06-14 13:55:20,044 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:55:20,045 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:55:20,045 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 277 transitions. [2024-06-14 13:55:20,045 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196998123827392 [2024-06-14 13:55:20,045 INFO L175 Difference]: Start difference. First operand has 370 places, 502 transitions, 7784 flow. Second operand 13 states and 277 transitions. [2024-06-14 13:55:20,045 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 535 transitions, 9116 flow [2024-06-14 13:55:23,092 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 535 transitions, 8765 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 13:55:23,099 INFO L231 Difference]: Finished difference. Result has 375 places, 502 transitions, 7775 flow [2024-06-14 13:55:23,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7437, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=162, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=340, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=7775, PETRI_PLACES=375, PETRI_TRANSITIONS=502} [2024-06-14 13:55:23,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-06-14 13:55:23,099 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 502 transitions, 7775 flow [2024-06-14 13:55:23,099 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:23,099 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:23,099 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:23,099 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-14 13:55:23,100 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)] === [2024-06-14 13:55:23,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:23,100 INFO L85 PathProgramCache]: Analyzing trace with hash 965448189, now seen corresponding path program 9 times [2024-06-14 13:55:23,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:23,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539486015] [2024-06-14 13:55:23,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:23,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:23,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:23,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:23,433 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:23,433 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539486015] [2024-06-14 13:55:23,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539486015] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:23,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:23,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:23,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [470271886] [2024-06-14 13:55:23,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:23,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:23,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:23,434 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:23,434 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:23,483 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:23,483 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 375 places, 502 transitions, 7775 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:23,483 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:23,483 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:23,483 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:24,304 INFO L124 PetriNetUnfolderBase]: 2620/4396 cut-off events. [2024-06-14 13:55:24,304 INFO L125 PetriNetUnfolderBase]: For 505238/505238 co-relation queries the response was YES. [2024-06-14 13:55:24,356 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34952 conditions, 4396 events. 2620/4396 cut-off events. For 505238/505238 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 28160 event pairs, 500 based on Foata normal form. 1/4389 useless extension candidates. Maximal degree in co-relation 34785. Up to 3767 conditions per place. [2024-06-14 13:55:24,373 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 380 selfloop transitions, 135 changer transitions 0/521 dead transitions. [2024-06-14 13:55:24,373 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 521 transitions, 9235 flow [2024-06-14 13:55:24,373 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:55:24,373 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:55:24,374 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:55:24,374 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 13:55:24,374 INFO L175 Difference]: Start difference. First operand has 375 places, 502 transitions, 7775 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:55:24,374 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 521 transitions, 9235 flow [2024-06-14 13:55:26,904 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 521 transitions, 8859 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-14 13:55:26,910 INFO L231 Difference]: Finished difference. Result has 369 places, 502 transitions, 7695 flow [2024-06-14 13:55:26,910 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7407, PETRI_DIFFERENCE_MINUEND_PLACES=362, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=135, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=367, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7695, PETRI_PLACES=369, PETRI_TRANSITIONS=502} [2024-06-14 13:55:26,910 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-14 13:55:26,910 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 502 transitions, 7695 flow [2024-06-14 13:55:26,910 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:26,911 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:26,911 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:26,911 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-14 13:55:26,911 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)] === [2024-06-14 13:55:26,911 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:26,911 INFO L85 PathProgramCache]: Analyzing trace with hash -1564660851, now seen corresponding path program 15 times [2024-06-14 13:55:26,912 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:26,912 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1763744828] [2024-06-14 13:55:26,912 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:26,912 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:26,919 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:27,224 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:27,225 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:27,225 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1763744828] [2024-06-14 13:55:27,225 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1763744828] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:27,225 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:27,225 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:27,225 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75043228] [2024-06-14 13:55:27,225 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:27,226 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:27,226 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:27,226 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:27,226 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:27,270 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:27,271 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 369 places, 502 transitions, 7695 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:27,271 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:27,271 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:27,271 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:28,215 INFO L124 PetriNetUnfolderBase]: 2614/4380 cut-off events. [2024-06-14 13:55:28,215 INFO L125 PetriNetUnfolderBase]: For 490741/490741 co-relation queries the response was YES. [2024-06-14 13:55:28,257 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34500 conditions, 4380 events. 2614/4380 cut-off events. For 490741/490741 co-relation queries the response was YES. Maximal size of possible extension queue 355. Compared 27978 event pairs, 504 based on Foata normal form. 2/4374 useless extension candidates. Maximal degree in co-relation 34332. Up to 3403 conditions per place. [2024-06-14 13:55:28,272 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 286 changer transitions 0/536 dead transitions. [2024-06-14 13:55:28,273 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 536 transitions, 9597 flow [2024-06-14 13:55:28,273 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 13:55:28,273 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 13:55:28,273 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-06-14 13:55:28,274 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631929046563193 [2024-06-14 13:55:28,274 INFO L175 Difference]: Start difference. First operand has 369 places, 502 transitions, 7695 flow. Second operand 11 states and 254 transitions. [2024-06-14 13:55:28,274 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 536 transitions, 9597 flow [2024-06-14 13:55:30,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 536 transitions, 9261 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-14 13:55:30,860 INFO L231 Difference]: Finished difference. Result has 371 places, 502 transitions, 7978 flow [2024-06-14 13:55:30,860 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7383, PETRI_DIFFERENCE_MINUEND_PLACES=360, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=286, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=216, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=7978, PETRI_PLACES=371, PETRI_TRANSITIONS=502} [2024-06-14 13:55:30,860 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-14 13:55:30,860 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 502 transitions, 7978 flow [2024-06-14 13:55:30,861 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:30,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:30,861 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:30,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-14 13:55:30,861 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)] === [2024-06-14 13:55:30,861 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:30,861 INFO L85 PathProgramCache]: Analyzing trace with hash -1021144545, now seen corresponding path program 10 times [2024-06-14 13:55:30,861 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:30,861 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [555581745] [2024-06-14 13:55:30,861 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:30,861 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:30,868 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:31,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:31,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:31,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [555581745] [2024-06-14 13:55:31,208 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [555581745] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:31,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:31,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:31,210 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [471273740] [2024-06-14 13:55:31,210 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:31,210 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:31,210 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:31,210 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:31,210 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:31,268 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:31,269 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 502 transitions, 7978 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:31,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:31,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:31,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:32,047 INFO L124 PetriNetUnfolderBase]: 2611/4388 cut-off events. [2024-06-14 13:55:32,047 INFO L125 PetriNetUnfolderBase]: For 464024/464030 co-relation queries the response was YES. [2024-06-14 13:55:32,091 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34588 conditions, 4388 events. 2611/4388 cut-off events. For 464024/464030 co-relation queries the response was YES. Maximal size of possible extension queue 357. Compared 28130 event pairs, 469 based on Foata normal form. 5/4391 useless extension candidates. Maximal degree in co-relation 34422. Up to 3842 conditions per place. [2024-06-14 13:55:32,106 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 443 selfloop transitions, 74 changer transitions 0/523 dead transitions. [2024-06-14 13:55:32,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 523 transitions, 9250 flow [2024-06-14 13:55:32,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:55:32,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:55:32,107 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-14 13:55:32,107 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-14 13:55:32,107 INFO L175 Difference]: Start difference. First operand has 371 places, 502 transitions, 7978 flow. Second operand 7 states and 164 transitions. [2024-06-14 13:55:32,107 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 523 transitions, 9250 flow [2024-06-14 13:55:34,340 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 523 transitions, 8638 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-06-14 13:55:34,346 INFO L231 Difference]: Finished difference. Result has 364 places, 502 transitions, 7529 flow [2024-06-14 13:55:34,346 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7374, PETRI_DIFFERENCE_MINUEND_PLACES=357, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=74, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=428, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7529, PETRI_PLACES=364, PETRI_TRANSITIONS=502} [2024-06-14 13:55:34,346 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-14 13:55:34,346 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 502 transitions, 7529 flow [2024-06-14 13:55:34,346 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:34,346 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:34,346 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:34,346 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-14 13:55:34,347 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)] === [2024-06-14 13:55:34,347 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:34,347 INFO L85 PathProgramCache]: Analyzing trace with hash -1021144731, now seen corresponding path program 16 times [2024-06-14 13:55:34,347 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:34,347 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [782306437] [2024-06-14 13:55:34,347 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:34,347 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:34,353 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:34,691 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:34,691 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:34,691 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [782306437] [2024-06-14 13:55:34,691 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [782306437] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:34,691 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:34,691 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:34,691 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1274666445] [2024-06-14 13:55:34,691 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:34,691 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:34,691 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:34,692 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:34,692 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:34,734 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:34,734 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 364 places, 502 transitions, 7529 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:34,734 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:34,734 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:34,734 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:35,570 INFO L124 PetriNetUnfolderBase]: 2655/4465 cut-off events. [2024-06-14 13:55:35,570 INFO L125 PetriNetUnfolderBase]: For 452542/452548 co-relation queries the response was YES. [2024-06-14 13:55:35,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34502 conditions, 4465 events. 2655/4465 cut-off events. For 452542/452548 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 28790 event pairs, 470 based on Foata normal form. 6/4469 useless extension candidates. Maximal degree in co-relation 34339. Up to 3817 conditions per place. [2024-06-14 13:55:35,630 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 438 selfloop transitions, 103 changer transitions 0/547 dead transitions. [2024-06-14 13:55:35,630 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 547 transitions, 9614 flow [2024-06-14 13:55:35,631 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:55:35,631 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:55:35,631 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-14 13:55:35,631 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-14 13:55:35,631 INFO L175 Difference]: Start difference. First operand has 364 places, 502 transitions, 7529 flow. Second operand 7 states and 171 transitions. [2024-06-14 13:55:35,631 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 547 transitions, 9614 flow [2024-06-14 13:55:37,744 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 547 transitions, 9386 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:55:37,751 INFO L231 Difference]: Finished difference. Result has 366 places, 519 transitions, 7904 flow [2024-06-14 13:55:37,751 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7338, PETRI_DIFFERENCE_MINUEND_PLACES=358, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=502, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=89, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=406, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7904, PETRI_PLACES=366, PETRI_TRANSITIONS=519} [2024-06-14 13:55:37,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-14 13:55:37,751 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 519 transitions, 7904 flow [2024-06-14 13:55:37,751 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:37,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:37,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:37,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-14 13:55:37,752 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)] === [2024-06-14 13:55:37,752 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:37,752 INFO L85 PathProgramCache]: Analyzing trace with hash -1013382765, now seen corresponding path program 11 times [2024-06-14 13:55:37,752 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:37,752 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1271443335] [2024-06-14 13:55:37,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:37,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:37,759 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:38,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:38,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:38,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1271443335] [2024-06-14 13:55:38,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1271443335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:38,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:38,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:38,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1105193980] [2024-06-14 13:55:38,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:38,094 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:38,094 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:38,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:38,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:38,133 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:38,133 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 366 places, 519 transitions, 7904 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:38,133 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:38,133 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:38,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:39,014 INFO L124 PetriNetUnfolderBase]: 2652/4461 cut-off events. [2024-06-14 13:55:39,015 INFO L125 PetriNetUnfolderBase]: For 454273/454279 co-relation queries the response was YES. [2024-06-14 13:55:39,059 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34652 conditions, 4461 events. 2652/4461 cut-off events. For 454273/454279 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 28760 event pairs, 469 based on Foata normal form. 5/4464 useless extension candidates. Maximal degree in co-relation 34487. Up to 3898 conditions per place. [2024-06-14 13:55:39,076 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 456 selfloop transitions, 77 changer transitions 0/539 dead transitions. [2024-06-14 13:55:39,076 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 539 transitions, 9020 flow [2024-06-14 13:55:39,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:55:39,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:55:39,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-14 13:55:39,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-14 13:55:39,077 INFO L175 Difference]: Start difference. First operand has 366 places, 519 transitions, 7904 flow. Second operand 7 states and 162 transitions. [2024-06-14 13:55:39,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 539 transitions, 9020 flow [2024-06-14 13:55:41,423 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 539 transitions, 8898 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-14 13:55:41,429 INFO L231 Difference]: Finished difference. Result has 371 places, 519 transitions, 7942 flow [2024-06-14 13:55:41,429 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7782, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=77, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=442, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7942, PETRI_PLACES=371, PETRI_TRANSITIONS=519} [2024-06-14 13:55:41,429 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-14 13:55:41,429 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 519 transitions, 7942 flow [2024-06-14 13:55:41,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:41,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:41,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:41,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-14 13:55:41,430 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)] === [2024-06-14 13:55:41,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:41,430 INFO L85 PathProgramCache]: Analyzing trace with hash -1021155891, now seen corresponding path program 17 times [2024-06-14 13:55:41,430 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:41,430 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1923279119] [2024-06-14 13:55:41,430 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:41,430 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:41,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:41,770 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:41,770 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:41,770 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1923279119] [2024-06-14 13:55:41,771 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1923279119] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:41,771 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:41,771 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:41,771 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2037185507] [2024-06-14 13:55:41,771 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:41,771 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:41,771 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:41,771 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:41,771 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:41,823 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:41,823 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 519 transitions, 7942 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:41,823 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:41,823 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:41,823 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:42,654 INFO L124 PetriNetUnfolderBase]: 2646/4453 cut-off events. [2024-06-14 13:55:42,655 INFO L125 PetriNetUnfolderBase]: For 449662/449668 co-relation queries the response was YES. [2024-06-14 13:55:42,700 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34492 conditions, 4453 events. 2646/4453 cut-off events. For 449662/449668 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 28723 event pairs, 469 based on Foata normal form. 6/4457 useless extension candidates. Maximal degree in co-relation 34326. Up to 3810 conditions per place. [2024-06-14 13:55:42,716 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 438 selfloop transitions, 108 changer transitions 0/552 dead transitions. [2024-06-14 13:55:42,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 552 transitions, 9560 flow [2024-06-14 13:55:42,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:55:42,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:55:42,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-14 13:55:42,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-14 13:55:42,717 INFO L175 Difference]: Start difference. First operand has 371 places, 519 transitions, 7942 flow. Second operand 7 states and 176 transitions. [2024-06-14 13:55:42,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 552 transitions, 9560 flow [2024-06-14 13:55:44,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 552 transitions, 9266 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-14 13:55:44,865 INFO L231 Difference]: Finished difference. Result has 371 places, 519 transitions, 7892 flow [2024-06-14 13:55:44,865 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7665, PETRI_DIFFERENCE_MINUEND_PLACES=364, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=108, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=411, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=7892, PETRI_PLACES=371, PETRI_TRANSITIONS=519} [2024-06-14 13:55:44,865 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-14 13:55:44,865 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 519 transitions, 7892 flow [2024-06-14 13:55:44,865 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:44,865 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:44,866 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:44,866 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-14 13:55:44,866 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)] === [2024-06-14 13:55:44,866 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:44,866 INFO L85 PathProgramCache]: Analyzing trace with hash 1103414459, now seen corresponding path program 17 times [2024-06-14 13:55:44,866 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:44,866 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [824060154] [2024-06-14 13:55:44,866 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:44,866 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:44,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:45,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:45,201 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:45,201 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [824060154] [2024-06-14 13:55:45,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [824060154] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:45,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:45,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:55:45,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1679490489] [2024-06-14 13:55:45,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:45,202 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:55:45,202 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:45,202 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:55:45,202 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:55:45,248 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:45,248 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 371 places, 519 transitions, 7892 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:45,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:45,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:45,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:46,070 INFO L124 PetriNetUnfolderBase]: 2648/4460 cut-off events. [2024-06-14 13:55:46,070 INFO L125 PetriNetUnfolderBase]: For 445677/445683 co-relation queries the response was YES. [2024-06-14 13:55:46,116 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34303 conditions, 4460 events. 2648/4460 cut-off events. For 445677/445683 co-relation queries the response was YES. Maximal size of possible extension queue 370. Compared 28802 event pairs, 469 based on Foata normal form. 6/4464 useless extension candidates. Maximal degree in co-relation 34137. Up to 3872 conditions per place. [2024-06-14 13:55:46,133 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 467 selfloop transitions, 78 changer transitions 0/551 dead transitions. [2024-06-14 13:55:46,133 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 551 transitions, 9358 flow [2024-06-14 13:55:46,133 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:55:46,133 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:55:46,134 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-14 13:55:46,134 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-14 13:55:46,134 INFO L175 Difference]: Start difference. First operand has 371 places, 519 transitions, 7892 flow. Second operand 6 states and 155 transitions. [2024-06-14 13:55:46,134 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 551 transitions, 9358 flow [2024-06-14 13:55:48,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 551 transitions, 9216 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-14 13:55:48,597 INFO L231 Difference]: Finished difference. Result has 374 places, 525 transitions, 8092 flow [2024-06-14 13:55:48,598 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7758, PETRI_DIFFERENCE_MINUEND_PLACES=367, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=519, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=72, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8092, PETRI_PLACES=374, PETRI_TRANSITIONS=525} [2024-06-14 13:55:48,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-14 13:55:48,598 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 525 transitions, 8092 flow [2024-06-14 13:55:48,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:48,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:48,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:48,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-14 13:55:48,598 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)] === [2024-06-14 13:55:48,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:48,599 INFO L85 PathProgramCache]: Analyzing trace with hash -1021150497, now seen corresponding path program 18 times [2024-06-14 13:55:48,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:48,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [775272979] [2024-06-14 13:55:48,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:48,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:48,606 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:48,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:48,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:48,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [775272979] [2024-06-14 13:55:48,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [775272979] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:48,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:48,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:55:48,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1784056168] [2024-06-14 13:55:48,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:48,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:55:48,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:48,927 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:55:48,927 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:55:48,956 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:48,956 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 374 places, 525 transitions, 8092 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:48,956 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:48,956 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:48,956 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:49,760 INFO L124 PetriNetUnfolderBase]: 2642/4448 cut-off events. [2024-06-14 13:55:49,760 INFO L125 PetriNetUnfolderBase]: For 438132/438138 co-relation queries the response was YES. [2024-06-14 13:55:49,809 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34159 conditions, 4448 events. 2642/4448 cut-off events. For 438132/438138 co-relation queries the response was YES. Maximal size of possible extension queue 368. Compared 28689 event pairs, 469 based on Foata normal form. 6/4452 useless extension candidates. Maximal degree in co-relation 33992. Up to 3866 conditions per place. [2024-06-14 13:55:49,826 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 463 selfloop transitions, 78 changer transitions 0/547 dead transitions. [2024-06-14 13:55:49,826 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 547 transitions, 9230 flow [2024-06-14 13:55:49,827 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:55:49,827 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:55:49,827 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 13:55:49,827 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-14 13:55:49,828 INFO L175 Difference]: Start difference. First operand has 374 places, 525 transitions, 8092 flow. Second operand 6 states and 151 transitions. [2024-06-14 13:55:49,828 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 547 transitions, 9230 flow [2024-06-14 13:55:52,237 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 547 transitions, 9137 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-14 13:55:52,243 INFO L231 Difference]: Finished difference. Result has 378 places, 525 transitions, 8169 flow [2024-06-14 13:55:52,243 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7999, PETRI_DIFFERENCE_MINUEND_PLACES=372, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=78, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=447, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8169, PETRI_PLACES=378, PETRI_TRANSITIONS=525} [2024-06-14 13:55:52,243 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-14 13:55:52,243 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 525 transitions, 8169 flow [2024-06-14 13:55:52,244 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:52,244 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:52,244 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:52,244 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-14 13:55:52,244 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)] === [2024-06-14 13:55:52,244 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:52,244 INFO L85 PathProgramCache]: Analyzing trace with hash 2098460679, now seen corresponding path program 18 times [2024-06-14 13:55:52,244 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:52,244 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [988868728] [2024-06-14 13:55:52,244 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:52,245 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:52,251 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:52,556 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:52,556 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:52,556 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [988868728] [2024-06-14 13:55:52,556 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [988868728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:52,556 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:52,556 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:52,556 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [283773359] [2024-06-14 13:55:52,557 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:52,557 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:52,557 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:52,557 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:52,557 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:52,611 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:52,611 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 378 places, 525 transitions, 8169 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:52,611 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:52,611 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:52,611 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:53,450 INFO L124 PetriNetUnfolderBase]: 2652/4466 cut-off events. [2024-06-14 13:55:53,450 INFO L125 PetriNetUnfolderBase]: For 444312/444318 co-relation queries the response was YES. [2024-06-14 13:55:53,496 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34434 conditions, 4466 events. 2652/4466 cut-off events. For 444312/444318 co-relation queries the response was YES. Maximal size of possible extension queue 371. Compared 28805 event pairs, 469 based on Foata normal form. 5/4469 useless extension candidates. Maximal degree in co-relation 34266. Up to 3893 conditions per place. [2024-06-14 13:55:53,512 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 458 selfloop transitions, 88 changer transitions 0/552 dead transitions. [2024-06-14 13:55:53,512 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 552 transitions, 9414 flow [2024-06-14 13:55:53,512 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:53,513 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:53,513 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:55:53,513 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:55:53,513 INFO L175 Difference]: Start difference. First operand has 378 places, 525 transitions, 8169 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:55:53,513 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 552 transitions, 9414 flow [2024-06-14 13:55:55,370 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 552 transitions, 9225 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-14 13:55:55,376 INFO L231 Difference]: Finished difference. Result has 381 places, 531 transitions, 8269 flow [2024-06-14 13:55:55,376 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7980, PETRI_DIFFERENCE_MINUEND_PLACES=373, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=525, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=440, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8269, PETRI_PLACES=381, PETRI_TRANSITIONS=531} [2024-06-14 13:55:55,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-14 13:55:55,376 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 531 transitions, 8269 flow [2024-06-14 13:55:55,376 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:55,376 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:55,376 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:55:55,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-14 13:55:55,377 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)] === [2024-06-14 13:55:55,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:55,377 INFO L85 PathProgramCache]: Analyzing trace with hash -1533890331, now seen corresponding path program 19 times [2024-06-14 13:55:55,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:55,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [718850715] [2024-06-14 13:55:55,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:55,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:55,386 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:55,686 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:55,687 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:55,687 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [718850715] [2024-06-14 13:55:55,687 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [718850715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:55,687 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:55,687 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:55:55,687 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [315969581] [2024-06-14 13:55:55,687 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:55,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:55:55,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:55,689 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:55:55,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:55:55,718 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:55,719 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 381 places, 531 transitions, 8269 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:55,719 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:55,719 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:55,719 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:56,580 INFO L124 PetriNetUnfolderBase]: 2654/4471 cut-off events. [2024-06-14 13:55:56,581 INFO L125 PetriNetUnfolderBase]: For 451944/451950 co-relation queries the response was YES. [2024-06-14 13:55:56,626 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34467 conditions, 4471 events. 2654/4471 cut-off events. For 451944/451950 co-relation queries the response was YES. Maximal size of possible extension queue 372. Compared 28884 event pairs, 469 based on Foata normal form. 6/4475 useless extension candidates. Maximal degree in co-relation 34298. Up to 3806 conditions per place. [2024-06-14 13:55:56,642 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 436 selfloop transitions, 126 changer transitions 0/568 dead transitions. [2024-06-14 13:55:56,642 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 568 transitions, 9714 flow [2024-06-14 13:55:56,643 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:56,643 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:56,643 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-14 13:55:56,643 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-14 13:55:56,644 INFO L175 Difference]: Start difference. First operand has 381 places, 531 transitions, 8269 flow. Second operand 8 states and 199 transitions. [2024-06-14 13:55:56,644 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 568 transitions, 9714 flow [2024-06-14 13:55:58,519 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 568 transitions, 9500 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:55:58,525 INFO L231 Difference]: Finished difference. Result has 384 places, 534 transitions, 8382 flow [2024-06-14 13:55:58,525 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8055, PETRI_DIFFERENCE_MINUEND_PLACES=376, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=531, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=123, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=408, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8382, PETRI_PLACES=384, PETRI_TRANSITIONS=534} [2024-06-14 13:55:58,525 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-14 13:55:58,526 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 534 transitions, 8382 flow [2024-06-14 13:55:58,526 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:58,526 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:55:58,526 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] [2024-06-14 13:55:58,526 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-14 13:55:58,526 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)] === [2024-06-14 13:55:58,527 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:55:58,527 INFO L85 PathProgramCache]: Analyzing trace with hash -1526652885, now seen corresponding path program 19 times [2024-06-14 13:55:58,527 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:55:58,527 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1947214313] [2024-06-14 13:55:58,527 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:55:58,527 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:55:58,534 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:55:58,823 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:55:58,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:55:58,824 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1947214313] [2024-06-14 13:55:58,824 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1947214313] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:55:58,824 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:55:58,824 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:55:58,824 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661118110] [2024-06-14 13:55:58,824 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:55:58,824 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:55:58,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:55:58,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:55:58,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:55:58,863 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:55:58,864 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 384 places, 534 transitions, 8382 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:55:58,864 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:55:58,864 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:55:58,864 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:55:59,806 INFO L124 PetriNetUnfolderBase]: 2683/4520 cut-off events. [2024-06-14 13:55:59,806 INFO L125 PetriNetUnfolderBase]: For 470879/470885 co-relation queries the response was YES. [2024-06-14 13:55:59,846 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35361 conditions, 4520 events. 2683/4520 cut-off events. For 470879/470885 co-relation queries the response was YES. Maximal size of possible extension queue 378. Compared 29291 event pairs, 469 based on Foata normal form. 5/4523 useless extension candidates. Maximal degree in co-relation 35191. Up to 3694 conditions per place. [2024-06-14 13:55:59,861 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 383 selfloop transitions, 182 changer transitions 0/571 dead transitions. [2024-06-14 13:55:59,861 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 571 transitions, 10572 flow [2024-06-14 13:55:59,862 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:55:59,862 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:55:59,862 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 13:55:59,862 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 13:55:59,862 INFO L175 Difference]: Start difference. First operand has 384 places, 534 transitions, 8382 flow. Second operand 8 states and 189 transitions. [2024-06-14 13:55:59,862 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 571 transitions, 10572 flow [2024-06-14 13:56:01,709 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 571 transitions, 10320 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:56:01,716 INFO L231 Difference]: Finished difference. Result has 386 places, 546 transitions, 8875 flow [2024-06-14 13:56:01,716 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8146, PETRI_DIFFERENCE_MINUEND_PLACES=377, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=534, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=170, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=358, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8875, PETRI_PLACES=386, PETRI_TRANSITIONS=546} [2024-06-14 13:56:01,716 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-14 13:56:01,716 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 546 transitions, 8875 flow [2024-06-14 13:56:01,716 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:01,717 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:01,717 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:01,717 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-14 13:56:01,717 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)] === [2024-06-14 13:56:01,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:01,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1537614795, now seen corresponding path program 20 times [2024-06-14 13:56:01,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:01,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [971839708] [2024-06-14 13:56:01,718 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:01,718 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:01,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:02,014 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:02,015 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:02,015 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [971839708] [2024-06-14 13:56:02,015 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [971839708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:02,015 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:02,015 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:02,015 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1210045659] [2024-06-14 13:56:02,015 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:02,015 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:02,015 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:02,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:02,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:02,061 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:02,061 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 386 places, 546 transitions, 8875 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:02,061 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:02,061 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:02,061 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:02,930 INFO L124 PetriNetUnfolderBase]: 2688/4526 cut-off events. [2024-06-14 13:56:02,930 INFO L125 PetriNetUnfolderBase]: For 464710/464716 co-relation queries the response was YES. [2024-06-14 13:56:02,977 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35684 conditions, 4526 events. 2688/4526 cut-off events. For 464710/464716 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29314 event pairs, 469 based on Foata normal form. 5/4529 useless extension candidates. Maximal degree in co-relation 35514. Up to 3698 conditions per place. [2024-06-14 13:56:02,994 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 383 selfloop transitions, 193 changer transitions 0/582 dead transitions. [2024-06-14 13:56:02,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 582 transitions, 10735 flow [2024-06-14 13:56:02,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:02,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:02,994 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-14 13:56:02,994 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-14 13:56:02,994 INFO L175 Difference]: Start difference. First operand has 386 places, 546 transitions, 8875 flow. Second operand 8 states and 197 transitions. [2024-06-14 13:56:02,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 582 transitions, 10735 flow [2024-06-14 13:56:05,364 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 582 transitions, 10288 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-14 13:56:05,371 INFO L231 Difference]: Finished difference. Result has 390 places, 549 transitions, 8888 flow [2024-06-14 13:56:05,372 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8449, PETRI_DIFFERENCE_MINUEND_PLACES=382, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=546, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=356, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8888, PETRI_PLACES=390, PETRI_TRANSITIONS=549} [2024-06-14 13:56:05,372 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-14 13:56:05,372 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 549 transitions, 8888 flow [2024-06-14 13:56:05,372 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:05,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:05,373 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:05,373 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-14 13:56:05,373 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)] === [2024-06-14 13:56:05,373 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:05,373 INFO L85 PathProgramCache]: Analyzing trace with hash -1537614981, now seen corresponding path program 20 times [2024-06-14 13:56:05,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:05,374 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325516972] [2024-06-14 13:56:05,374 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:05,374 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:05,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:05,700 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:05,700 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:05,700 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325516972] [2024-06-14 13:56:05,700 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325516972] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:05,700 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:05,701 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:56:05,701 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1054404225] [2024-06-14 13:56:05,701 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:05,702 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:56:05,702 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:05,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:56:05,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:56:05,730 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:05,730 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 549 transitions, 8888 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:05,730 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:05,730 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:05,730 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:06,641 INFO L124 PetriNetUnfolderBase]: 2682/4518 cut-off events. [2024-06-14 13:56:06,641 INFO L125 PetriNetUnfolderBase]: For 468409/468415 co-relation queries the response was YES. [2024-06-14 13:56:06,689 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35488 conditions, 4518 events. 2682/4518 cut-off events. For 468409/468415 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29248 event pairs, 469 based on Foata normal form. 6/4522 useless extension candidates. Maximal degree in co-relation 35317. Up to 3815 conditions per place. [2024-06-14 13:56:06,707 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 444 selfloop transitions, 129 changer transitions 0/579 dead transitions. [2024-06-14 13:56:06,707 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 579 transitions, 10298 flow [2024-06-14 13:56:06,707 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:56:06,707 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:56:06,707 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-14 13:56:06,707 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-14 13:56:06,708 INFO L175 Difference]: Start difference. First operand has 390 places, 549 transitions, 8888 flow. Second operand 7 states and 177 transitions. [2024-06-14 13:56:06,708 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 579 transitions, 10298 flow [2024-06-14 13:56:08,836 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 579 transitions, 9645 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:56:08,843 INFO L231 Difference]: Finished difference. Result has 390 places, 549 transitions, 8507 flow [2024-06-14 13:56:08,843 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8235, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=129, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8507, PETRI_PLACES=390, PETRI_TRANSITIONS=549} [2024-06-14 13:56:08,843 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-14 13:56:08,843 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 549 transitions, 8507 flow [2024-06-14 13:56:08,843 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:08,843 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:08,843 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:08,843 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-14 13:56:08,843 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)] === [2024-06-14 13:56:08,844 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:08,844 INFO L85 PathProgramCache]: Analyzing trace with hash 2050747897, now seen corresponding path program 21 times [2024-06-14 13:56:08,844 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:08,844 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [140274990] [2024-06-14 13:56:08,844 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:08,844 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:08,850 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:09,148 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:09,148 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:09,148 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [140274990] [2024-06-14 13:56:09,148 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [140274990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:09,148 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:09,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:09,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1238015628] [2024-06-14 13:56:09,149 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:09,149 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:09,149 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:09,149 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:09,149 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:09,200 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:09,200 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 549 transitions, 8507 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:09,200 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:09,200 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:09,200 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:10,074 INFO L124 PetriNetUnfolderBase]: 2679/4514 cut-off events. [2024-06-14 13:56:10,074 INFO L125 PetriNetUnfolderBase]: For 464908/464914 co-relation queries the response was YES. [2024-06-14 13:56:10,123 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35178 conditions, 4514 events. 2679/4514 cut-off events. For 464908/464914 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29242 event pairs, 469 based on Foata normal form. 5/4517 useless extension candidates. Maximal degree in co-relation 35006. Up to 3691 conditions per place. [2024-06-14 13:56:10,140 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 192 changer transitions 0/579 dead transitions. [2024-06-14 13:56:10,140 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 579 transitions, 10297 flow [2024-06-14 13:56:10,141 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:10,141 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:10,141 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-14 13:56:10,141 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-14 13:56:10,141 INFO L175 Difference]: Start difference. First operand has 390 places, 549 transitions, 8507 flow. Second operand 8 states and 194 transitions. [2024-06-14 13:56:10,141 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 579 transitions, 10297 flow [2024-06-14 13:56:12,757 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 579 transitions, 9909 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-14 13:56:12,763 INFO L231 Difference]: Finished difference. Result has 391 places, 549 transitions, 8515 flow [2024-06-14 13:56:12,764 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8125, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=357, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8515, PETRI_PLACES=391, PETRI_TRANSITIONS=549} [2024-06-14 13:56:12,764 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-14 13:56:12,764 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 549 transitions, 8515 flow [2024-06-14 13:56:12,764 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:12,764 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:12,764 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:12,764 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-14 13:56:12,764 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)] === [2024-06-14 13:56:12,765 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:12,765 INFO L85 PathProgramCache]: Analyzing trace with hash 2091097869, now seen corresponding path program 22 times [2024-06-14 13:56:12,765 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:12,765 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291314624] [2024-06-14 13:56:12,765 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:12,765 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:12,771 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:13,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:13,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:13,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291314624] [2024-06-14 13:56:13,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291314624] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:13,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:13,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:13,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [667694641] [2024-06-14 13:56:13,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:13,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:13,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:13,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:13,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:13,134 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:13,134 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 549 transitions, 8515 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:13,134 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:13,134 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:13,134 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:13,979 INFO L124 PetriNetUnfolderBase]: 2676/4510 cut-off events. [2024-06-14 13:56:13,979 INFO L125 PetriNetUnfolderBase]: For 460388/460394 co-relation queries the response was YES. [2024-06-14 13:56:14,025 INFO L83 FinitePrefix]: Finished finitePrefix Result has 35107 conditions, 4510 events. 2676/4510 cut-off events. For 460388/460394 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29217 event pairs, 469 based on Foata normal form. 5/4513 useless extension candidates. Maximal degree in co-relation 34935. Up to 3905 conditions per place. [2024-06-14 13:56:14,040 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 468 selfloop transitions, 103 changer transitions 0/577 dead transitions. [2024-06-14 13:56:14,041 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 577 transitions, 9917 flow [2024-06-14 13:56:14,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:56:14,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:56:14,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 13:56:14,041 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 13:56:14,041 INFO L175 Difference]: Start difference. First operand has 391 places, 549 transitions, 8515 flow. Second operand 8 states and 189 transitions. [2024-06-14 13:56:14,041 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 577 transitions, 9917 flow [2024-06-14 13:56:16,628 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 577 transitions, 9470 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-14 13:56:16,634 INFO L231 Difference]: Finished difference. Result has 392 places, 549 transitions, 8280 flow [2024-06-14 13:56:16,635 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8068, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=103, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=446, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8280, PETRI_PLACES=392, PETRI_TRANSITIONS=549} [2024-06-14 13:56:16,635 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-14 13:56:16,635 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 549 transitions, 8280 flow [2024-06-14 13:56:16,635 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:16,635 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:16,635 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:16,635 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-14 13:56:16,635 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)] === [2024-06-14 13:56:16,635 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:16,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2091097683, now seen corresponding path program 21 times [2024-06-14 13:56:16,636 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:16,636 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466372407] [2024-06-14 13:56:16,636 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:16,636 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:16,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:16,939 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:16,939 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:16,939 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466372407] [2024-06-14 13:56:16,939 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466372407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:16,939 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:16,939 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-14 13:56:16,939 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2022018405] [2024-06-14 13:56:16,939 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:16,939 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-14 13:56:16,940 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:16,940 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-14 13:56:16,940 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-14 13:56:16,980 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:16,980 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 392 places, 549 transitions, 8280 flow. Second operand has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:16,980 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:16,980 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:16,980 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:17,852 INFO L124 PetriNetUnfolderBase]: 2670/4502 cut-off events. [2024-06-14 13:56:17,852 INFO L125 PetriNetUnfolderBase]: For 462408/462414 co-relation queries the response was YES. [2024-06-14 13:56:17,901 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34645 conditions, 4502 events. 2670/4502 cut-off events. For 462408/462414 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29147 event pairs, 469 based on Foata normal form. 6/4506 useless extension candidates. Maximal degree in co-relation 34472. Up to 3831 conditions per place. [2024-06-14 13:56:17,918 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 451 selfloop transitions, 117 changer transitions 0/574 dead transitions. [2024-06-14 13:56:17,918 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 574 transitions, 9480 flow [2024-06-14 13:56:17,918 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:56:17,918 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:56:17,918 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-14 13:56:17,919 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-14 13:56:17,919 INFO L175 Difference]: Start difference. First operand has 392 places, 549 transitions, 8280 flow. Second operand 6 states and 154 transitions. [2024-06-14 13:56:17,919 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 574 transitions, 9480 flow [2024-06-14 13:56:20,310 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 574 transitions, 9156 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-14 13:56:20,316 INFO L231 Difference]: Finished difference. Result has 390 places, 549 transitions, 8216 flow [2024-06-14 13:56:20,316 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7956, PETRI_DIFFERENCE_MINUEND_PLACES=384, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=117, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=432, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8216, PETRI_PLACES=390, PETRI_TRANSITIONS=549} [2024-06-14 13:56:20,317 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-14 13:56:20,317 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 549 transitions, 8216 flow [2024-06-14 13:56:20,317 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 15.428571428571429) internal successors, (108), 7 states have internal predecessors, (108), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:20,317 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:20,317 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:20,317 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-14 13:56:20,317 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)] === [2024-06-14 13:56:20,317 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:20,317 INFO L85 PathProgramCache]: Analyzing trace with hash 2091109029, now seen corresponding path program 23 times [2024-06-14 13:56:20,317 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:20,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1532126509] [2024-06-14 13:56:20,318 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:20,318 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:20,325 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:20,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:20,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:20,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1532126509] [2024-06-14 13:56:20,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1532126509] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:20,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:20,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:20,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [484230321] [2024-06-14 13:56:20,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:20,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:20,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:20,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:20,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:20,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:20,695 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 390 places, 549 transitions, 8216 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:20,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:20,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:20,695 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:21,561 INFO L124 PetriNetUnfolderBase]: 2667/4498 cut-off events. [2024-06-14 13:56:21,561 INFO L125 PetriNetUnfolderBase]: For 462029/462035 co-relation queries the response was YES. [2024-06-14 13:56:21,608 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34637 conditions, 4498 events. 2667/4498 cut-off events. For 462029/462035 co-relation queries the response was YES. Maximal size of possible extension queue 379. Compared 29153 event pairs, 469 based on Foata normal form. 5/4501 useless extension candidates. Maximal degree in co-relation 34463. Up to 3894 conditions per place. [2024-06-14 13:56:21,624 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 468 selfloop transitions, 104 changer transitions 0/578 dead transitions. [2024-06-14 13:56:21,624 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 578 transitions, 9432 flow [2024-06-14 13:56:21,624 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:56:21,624 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:56:21,624 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-14 13:56:21,625 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414634146341464 [2024-06-14 13:56:21,625 INFO L175 Difference]: Start difference. First operand has 390 places, 549 transitions, 8216 flow. Second operand 10 states and 222 transitions. [2024-06-14 13:56:21,625 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 578 transitions, 9432 flow [2024-06-14 13:56:23,907 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 578 transitions, 9150 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-14 13:56:23,913 INFO L231 Difference]: Finished difference. Result has 393 places, 549 transitions, 8148 flow [2024-06-14 13:56:23,913 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7934, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=104, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=445, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=8148, PETRI_PLACES=393, PETRI_TRANSITIONS=549} [2024-06-14 13:56:23,913 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-14 13:56:23,914 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 549 transitions, 8148 flow [2024-06-14 13:56:23,914 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:23,914 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:23,914 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:23,914 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-14 13:56:23,914 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)] === [2024-06-14 13:56:23,914 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:23,914 INFO L85 PathProgramCache]: Analyzing trace with hash 2061869395, now seen corresponding path program 2 times [2024-06-14 13:56:23,914 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:23,914 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624264356] [2024-06-14 13:56:23,914 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:23,914 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:23,921 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:24,242 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:24,242 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:24,242 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624264356] [2024-06-14 13:56:24,242 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624264356] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:24,242 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:24,242 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:24,242 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [664414567] [2024-06-14 13:56:24,242 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:24,242 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:24,243 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:24,243 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:24,243 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:24,314 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:24,314 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 393 places, 549 transitions, 8148 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:24,314 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:24,314 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:24,314 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:25,289 INFO L124 PetriNetUnfolderBase]: 2687/4533 cut-off events. [2024-06-14 13:56:25,289 INFO L125 PetriNetUnfolderBase]: For 475154/475154 co-relation queries the response was YES. [2024-06-14 13:56:25,331 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34601 conditions, 4533 events. 2687/4533 cut-off events. For 475154/475154 co-relation queries the response was YES. Maximal size of possible extension queue 382. Compared 29370 event pairs, 463 based on Foata normal form. 6/4538 useless extension candidates. Maximal degree in co-relation 34428. Up to 3970 conditions per place. [2024-06-14 13:56:25,345 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 534 selfloop transitions, 36 changer transitions 0/576 dead transitions. [2024-06-14 13:56:25,345 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 576 transitions, 9430 flow [2024-06-14 13:56:25,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:56:25,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:56:25,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 13:56:25,346 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-14 13:56:25,346 INFO L175 Difference]: Start difference. First operand has 393 places, 549 transitions, 8148 flow. Second operand 7 states and 158 transitions. [2024-06-14 13:56:25,346 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 576 transitions, 9430 flow [2024-06-14 13:56:28,469 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 576 transitions, 9169 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-14 13:56:28,475 INFO L231 Difference]: Finished difference. Result has 391 places, 552 transitions, 8018 flow [2024-06-14 13:56:28,476 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7887, PETRI_DIFFERENCE_MINUEND_PLACES=383, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=549, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=34, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=514, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8018, PETRI_PLACES=391, PETRI_TRANSITIONS=552} [2024-06-14 13:56:28,476 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-14 13:56:28,476 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 552 transitions, 8018 flow [2024-06-14 13:56:28,476 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:28,476 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:28,476 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:28,476 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-14 13:56:28,476 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)] === [2024-06-14 13:56:28,477 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:28,477 INFO L85 PathProgramCache]: Analyzing trace with hash -1836056659, now seen corresponding path program 3 times [2024-06-14 13:56:28,477 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:28,477 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1049339250] [2024-06-14 13:56:28,477 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:28,477 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:28,483 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:28,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:28,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:28,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1049339250] [2024-06-14 13:56:28,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1049339250] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:28,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:28,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:28,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [884374196] [2024-06-14 13:56:28,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:28,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:28,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:28,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:28,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:28,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:28,860 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 391 places, 552 transitions, 8018 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:28,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:28,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:28,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:29,765 INFO L124 PetriNetUnfolderBase]: 2707/4569 cut-off events. [2024-06-14 13:56:29,765 INFO L125 PetriNetUnfolderBase]: For 484356/484356 co-relation queries the response was YES. [2024-06-14 13:56:29,817 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34786 conditions, 4569 events. 2707/4569 cut-off events. For 484356/484356 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 29630 event pairs, 387 based on Foata normal form. 6/4574 useless extension candidates. Maximal degree in co-relation 34611. Up to 4007 conditions per place. [2024-06-14 13:56:29,834 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 544 selfloop transitions, 31 changer transitions 0/581 dead transitions. [2024-06-14 13:56:29,835 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 581 transitions, 9325 flow [2024-06-14 13:56:29,835 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:56:29,835 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:56:29,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-14 13:56:29,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-14 13:56:29,835 INFO L175 Difference]: Start difference. First operand has 391 places, 552 transitions, 8018 flow. Second operand 6 states and 145 transitions. [2024-06-14 13:56:29,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 581 transitions, 9325 flow [2024-06-14 13:56:32,231 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 581 transitions, 9267 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-14 13:56:32,238 INFO L231 Difference]: Finished difference. Result has 395 places, 555 transitions, 8093 flow [2024-06-14 13:56:32,238 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=7960, PETRI_DIFFERENCE_MINUEND_PLACES=388, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=552, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=29, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8093, PETRI_PLACES=395, PETRI_TRANSITIONS=555} [2024-06-14 13:56:32,238 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-14 13:56:32,238 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 555 transitions, 8093 flow [2024-06-14 13:56:32,239 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:32,239 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:32,239 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:32,239 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-14 13:56:32,239 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)] === [2024-06-14 13:56:32,239 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:32,239 INFO L85 PathProgramCache]: Analyzing trace with hash 2041080969, now seen corresponding path program 4 times [2024-06-14 13:56:32,240 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:32,240 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1027355261] [2024-06-14 13:56:32,240 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:32,240 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:32,249 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:32,580 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:32,580 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:32,580 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1027355261] [2024-06-14 13:56:32,580 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1027355261] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:32,580 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:32,580 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:32,580 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894427360] [2024-06-14 13:56:32,580 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:32,581 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:32,581 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:32,581 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:32,581 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:32,619 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:32,620 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 395 places, 555 transitions, 8093 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:32,620 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:32,620 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:32,620 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:33,532 INFO L124 PetriNetUnfolderBase]: 2694/4548 cut-off events. [2024-06-14 13:56:33,532 INFO L125 PetriNetUnfolderBase]: For 465117/465117 co-relation queries the response was YES. [2024-06-14 13:56:33,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 34311 conditions, 4548 events. 2694/4548 cut-off events. For 465117/465117 co-relation queries the response was YES. Maximal size of possible extension queue 385. Compared 29474 event pairs, 378 based on Foata normal form. 6/4553 useless extension candidates. Maximal degree in co-relation 34133. Up to 3950 conditions per place. [2024-06-14 13:56:33,605 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 546 selfloop transitions, 35 changer transitions 0/587 dead transitions. [2024-06-14 13:56:33,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 587 transitions, 9426 flow [2024-06-14 13:56:33,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:56:33,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:56:33,605 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-14 13:56:33,605 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-14 13:56:33,606 INFO L175 Difference]: Start difference. First operand has 395 places, 555 transitions, 8093 flow. Second operand 7 states and 163 transitions. [2024-06-14 13:56:33,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 587 transitions, 9426 flow [2024-06-14 13:56:36,822 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 587 transitions, 9378 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-14 13:56:36,830 INFO L231 Difference]: Finished difference. Result has 402 places, 559 transitions, 8202 flow [2024-06-14 13:56:36,830 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8045, PETRI_DIFFERENCE_MINUEND_PLACES=393, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=555, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=31, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=522, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8202, PETRI_PLACES=402, PETRI_TRANSITIONS=559} [2024-06-14 13:56:36,830 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-14 13:56:36,831 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 559 transitions, 8202 flow [2024-06-14 13:56:36,831 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:36,831 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:36,831 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:36,831 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-14 13:56:36,831 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)] === [2024-06-14 13:56:36,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:36,832 INFO L85 PathProgramCache]: Analyzing trace with hash 744438695, now seen corresponding path program 1 times [2024-06-14 13:56:36,832 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:36,832 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1692338219] [2024-06-14 13:56:36,832 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:36,832 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:36,841 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:37,169 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:37,169 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:37,169 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1692338219] [2024-06-14 13:56:37,169 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1692338219] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:37,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:37,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:37,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1414203822] [2024-06-14 13:56:37,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:37,170 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:37,170 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:37,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:37,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:37,225 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:37,225 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 402 places, 559 transitions, 8202 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:37,225 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:37,225 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:37,225 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:38,125 INFO L124 PetriNetUnfolderBase]: 2780/4698 cut-off events. [2024-06-14 13:56:38,125 INFO L125 PetriNetUnfolderBase]: For 548301/548318 co-relation queries the response was YES. [2024-06-14 13:56:38,177 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36185 conditions, 4698 events. 2780/4698 cut-off events. For 548301/548318 co-relation queries the response was YES. Maximal size of possible extension queue 389. Compared 30754 event pairs, 480 based on Foata normal form. 24/4716 useless extension candidates. Maximal degree in co-relation 36003. Up to 3629 conditions per place. [2024-06-14 13:56:38,194 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 430 selfloop transitions, 152 changer transitions 0/588 dead transitions. [2024-06-14 13:56:38,194 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 588 transitions, 9718 flow [2024-06-14 13:56:38,194 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:56:38,194 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:56:38,195 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:56:38,195 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 13:56:38,195 INFO L175 Difference]: Start difference. First operand has 402 places, 559 transitions, 8202 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:56:38,195 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 588 transitions, 9718 flow [2024-06-14 13:56:41,088 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 588 transitions, 9561 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-14 13:56:41,094 INFO L231 Difference]: Finished difference. Result has 404 places, 562 transitions, 8414 flow [2024-06-14 13:56:41,095 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8045, PETRI_DIFFERENCE_MINUEND_PLACES=397, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=559, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=150, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=409, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8414, PETRI_PLACES=404, PETRI_TRANSITIONS=562} [2024-06-14 13:56:41,095 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-14 13:56:41,095 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 562 transitions, 8414 flow [2024-06-14 13:56:41,095 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:41,095 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:41,095 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:41,095 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-14 13:56:41,095 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)] === [2024-06-14 13:56:41,095 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:41,096 INFO L85 PathProgramCache]: Analyzing trace with hash -208587725, now seen corresponding path program 2 times [2024-06-14 13:56:41,096 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:41,096 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1760903730] [2024-06-14 13:56:41,096 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:41,096 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:41,104 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:41,479 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:41,479 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:41,479 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1760903730] [2024-06-14 13:56:41,479 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1760903730] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:41,479 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:41,479 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:41,479 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [108274227] [2024-06-14 13:56:41,479 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:41,480 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:41,480 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:41,480 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:41,480 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:41,536 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:41,536 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 404 places, 562 transitions, 8414 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:41,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:41,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:41,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:42,431 INFO L124 PetriNetUnfolderBase]: 2836/4794 cut-off events. [2024-06-14 13:56:42,431 INFO L125 PetriNetUnfolderBase]: For 581561/581578 co-relation queries the response was YES. [2024-06-14 13:56:42,483 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36909 conditions, 4794 events. 2836/4794 cut-off events. For 581561/581578 co-relation queries the response was YES. Maximal size of possible extension queue 396. Compared 31534 event pairs, 559 based on Foata normal form. 28/4816 useless extension candidates. Maximal degree in co-relation 36728. Up to 4035 conditions per place. [2024-06-14 13:56:42,501 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 436 selfloop transitions, 140 changer transitions 0/582 dead transitions. [2024-06-14 13:56:42,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 582 transitions, 9672 flow [2024-06-14 13:56:42,502 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:56:42,502 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:56:42,502 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-14 13:56:42,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-14 13:56:42,502 INFO L175 Difference]: Start difference. First operand has 404 places, 562 transitions, 8414 flow. Second operand 7 states and 158 transitions. [2024-06-14 13:56:42,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 582 transitions, 9672 flow [2024-06-14 13:56:45,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 582 transitions, 9385 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-14 13:56:45,520 INFO L231 Difference]: Finished difference. Result has 407 places, 564 transitions, 8457 flow [2024-06-14 13:56:45,520 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8129, PETRI_DIFFERENCE_MINUEND_PLACES=400, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=562, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=138, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=422, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8457, PETRI_PLACES=407, PETRI_TRANSITIONS=564} [2024-06-14 13:56:45,520 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-14 13:56:45,520 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 564 transitions, 8457 flow [2024-06-14 13:56:45,521 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:45,521 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:45,521 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:45,521 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-14 13:56:45,521 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)] === [2024-06-14 13:56:45,521 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:45,522 INFO L85 PathProgramCache]: Analyzing trace with hash -208735595, now seen corresponding path program 3 times [2024-06-14 13:56:45,522 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:45,522 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2021991822] [2024-06-14 13:56:45,522 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:45,522 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:45,531 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:45,978 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:45,978 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:45,979 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2021991822] [2024-06-14 13:56:45,979 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2021991822] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:45,979 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:45,979 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:45,979 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851616128] [2024-06-14 13:56:45,979 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:45,979 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:45,979 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:45,979 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:45,979 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:46,029 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:46,029 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 407 places, 564 transitions, 8457 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:46,029 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:46,029 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:46,029 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:47,079 INFO L124 PetriNetUnfolderBase]: 2876/4858 cut-off events. [2024-06-14 13:56:47,079 INFO L125 PetriNetUnfolderBase]: For 573066/573083 co-relation queries the response was YES. [2024-06-14 13:56:47,126 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37405 conditions, 4858 events. 2876/4858 cut-off events. For 573066/573083 co-relation queries the response was YES. Maximal size of possible extension queue 398. Compared 31990 event pairs, 555 based on Foata normal form. 24/4876 useless extension candidates. Maximal degree in co-relation 37223. Up to 4039 conditions per place. [2024-06-14 13:56:47,144 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 437 selfloop transitions, 144 changer transitions 0/587 dead transitions. [2024-06-14 13:56:47,144 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 587 transitions, 9745 flow [2024-06-14 13:56:47,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:56:47,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:56:47,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-14 13:56:47,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:56:47,145 INFO L175 Difference]: Start difference. First operand has 407 places, 564 transitions, 8457 flow. Second operand 7 states and 161 transitions. [2024-06-14 13:56:47,145 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 587 transitions, 9745 flow [2024-06-14 13:56:50,183 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 587 transitions, 9447 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:56:50,189 INFO L231 Difference]: Finished difference. Result has 409 places, 566 transitions, 8498 flow [2024-06-14 13:56:50,190 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8159, PETRI_DIFFERENCE_MINUEND_PLACES=402, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=564, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=142, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=420, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8498, PETRI_PLACES=409, PETRI_TRANSITIONS=566} [2024-06-14 13:56:50,190 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-14 13:56:50,190 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 566 transitions, 8498 flow [2024-06-14 13:56:50,190 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:50,190 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:50,190 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:50,190 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-14 13:56:50,190 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)] === [2024-06-14 13:56:50,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:50,191 INFO L85 PathProgramCache]: Analyzing trace with hash -1013373837, now seen corresponding path program 4 times [2024-06-14 13:56:50,191 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:50,191 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1310932144] [2024-06-14 13:56:50,191 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:50,191 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:50,197 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:50,538 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:50,538 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:50,538 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1310932144] [2024-06-14 13:56:50,538 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1310932144] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:50,538 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:50,538 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:50,538 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [122897391] [2024-06-14 13:56:50,539 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:50,539 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:50,539 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:50,539 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:50,539 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:50,582 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:50,582 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 409 places, 566 transitions, 8498 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:50,582 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:50,582 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:50,582 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:51,558 INFO L124 PetriNetUnfolderBase]: 2919/4926 cut-off events. [2024-06-14 13:56:51,558 INFO L125 PetriNetUnfolderBase]: For 591009/591015 co-relation queries the response was YES. [2024-06-14 13:56:51,614 INFO L83 FinitePrefix]: Finished finitePrefix Result has 37718 conditions, 4926 events. 2919/4926 cut-off events. For 591009/591015 co-relation queries the response was YES. Maximal size of possible extension queue 402. Compared 32428 event pairs, 529 based on Foata normal form. 20/4944 useless extension candidates. Maximal degree in co-relation 37535. Up to 4250 conditions per place. [2024-06-14 13:56:51,632 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 501 selfloop transitions, 85 changer transitions 0/592 dead transitions. [2024-06-14 13:56:51,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 592 transitions, 9798 flow [2024-06-14 13:56:51,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:56:51,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:56:51,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-14 13:56:51,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-14 13:56:51,633 INFO L175 Difference]: Start difference. First operand has 409 places, 566 transitions, 8498 flow. Second operand 7 states and 165 transitions. [2024-06-14 13:56:51,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 592 transitions, 9798 flow [2024-06-14 13:56:55,335 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 592 transitions, 9483 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:56:55,342 INFO L231 Difference]: Finished difference. Result has 411 places, 568 transitions, 8411 flow [2024-06-14 13:56:55,342 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8183, PETRI_DIFFERENCE_MINUEND_PLACES=404, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=566, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=83, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=481, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8411, PETRI_PLACES=411, PETRI_TRANSITIONS=568} [2024-06-14 13:56:55,342 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-14 13:56:55,342 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 568 transitions, 8411 flow [2024-06-14 13:56:55,343 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:55,343 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:55,343 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:55,343 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-14 13:56:55,343 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)] === [2024-06-14 13:56:55,343 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:55,343 INFO L85 PathProgramCache]: Analyzing trace with hash -1013521707, now seen corresponding path program 5 times [2024-06-14 13:56:55,343 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:55,343 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [536836072] [2024-06-14 13:56:55,343 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:55,344 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:55,351 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:56:55,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:56:55,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:56:55,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [536836072] [2024-06-14 13:56:55,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [536836072] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:56:55,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:56:55,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:56:55,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1864382888] [2024-06-14 13:56:55,702 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:56:55,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:56:55,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:56:55,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:56:55,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:56:55,763 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:56:55,763 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 411 places, 568 transitions, 8411 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:55,763 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:56:55,763 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:56:55,763 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:56:56,744 INFO L124 PetriNetUnfolderBase]: 2972/5013 cut-off events. [2024-06-14 13:56:56,744 INFO L125 PetriNetUnfolderBase]: For 593396/593402 co-relation queries the response was YES. [2024-06-14 13:56:56,802 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38473 conditions, 5013 events. 2972/5013 cut-off events. For 593396/593402 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 33072 event pairs, 461 based on Foata normal form. 16/5027 useless extension candidates. Maximal degree in co-relation 38289. Up to 4108 conditions per place. [2024-06-14 13:56:56,821 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 501 selfloop transitions, 94 changer transitions 0/601 dead transitions. [2024-06-14 13:56:56,821 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 601 transitions, 9977 flow [2024-06-14 13:56:56,821 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 13:56:56,821 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 13:56:56,821 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-14 13:56:56,822 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-14 13:56:56,822 INFO L175 Difference]: Start difference. First operand has 411 places, 568 transitions, 8411 flow. Second operand 7 states and 172 transitions. [2024-06-14 13:56:56,822 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 601 transitions, 9977 flow [2024-06-14 13:56:59,643 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 601 transitions, 9783 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-14 13:56:59,650 INFO L231 Difference]: Finished difference. Result has 413 places, 570 transitions, 8472 flow [2024-06-14 13:56:59,650 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8217, PETRI_DIFFERENCE_MINUEND_PLACES=406, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=568, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=93, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=475, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=8472, PETRI_PLACES=413, PETRI_TRANSITIONS=570} [2024-06-14 13:56:59,650 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-14 13:56:59,650 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 570 transitions, 8472 flow [2024-06-14 13:56:59,650 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:56:59,650 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:56:59,650 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:56:59,650 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-14 13:56:59,650 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)] === [2024-06-14 13:56:59,651 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:56:59,651 INFO L85 PathProgramCache]: Analyzing trace with hash -1007796255, now seen corresponding path program 1 times [2024-06-14 13:56:59,651 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:56:59,651 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [778596466] [2024-06-14 13:56:59,651 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:56:59,651 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:56:59,660 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:00,017 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:00,018 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:00,018 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [778596466] [2024-06-14 13:57:00,018 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [778596466] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:00,018 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:00,018 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:00,018 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799394162] [2024-06-14 13:57:00,018 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:00,018 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:00,018 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:00,018 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:00,018 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:00,076 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:00,076 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 413 places, 570 transitions, 8472 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:00,077 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:00,077 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:00,077 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:01,046 INFO L124 PetriNetUnfolderBase]: 2939/4960 cut-off events. [2024-06-14 13:57:01,046 INFO L125 PetriNetUnfolderBase]: For 538776/538782 co-relation queries the response was YES. [2024-06-14 13:57:01,267 INFO L83 FinitePrefix]: Finished finitePrefix Result has 36959 conditions, 4960 events. 2939/4960 cut-off events. For 538776/538782 co-relation queries the response was YES. Maximal size of possible extension queue 403. Compared 32736 event pairs, 416 based on Foata normal form. 16/4974 useless extension candidates. Maximal degree in co-relation 36774. Up to 4013 conditions per place. [2024-06-14 13:57:01,283 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 519 selfloop transitions, 71 changer transitions 0/596 dead transitions. [2024-06-14 13:57:01,283 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 596 transitions, 9750 flow [2024-06-14 13:57:01,283 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-14 13:57:01,284 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-14 13:57:01,284 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-14 13:57:01,284 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-14 13:57:01,284 INFO L175 Difference]: Start difference. First operand has 413 places, 570 transitions, 8472 flow. Second operand 6 states and 151 transitions. [2024-06-14 13:57:01,284 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 596 transitions, 9750 flow [2024-06-14 13:57:04,102 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 596 transitions, 9569 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-14 13:57:04,109 INFO L231 Difference]: Finished difference. Result has 415 places, 570 transitions, 8440 flow [2024-06-14 13:57:04,109 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8291, PETRI_DIFFERENCE_MINUEND_PLACES=409, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=499, PETRI_DIFFERENCE_SUBTRAHEND_STATES=6, PETRI_FLOW=8440, PETRI_PLACES=415, PETRI_TRANSITIONS=570} [2024-06-14 13:57:04,109 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-14 13:57:04,110 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 570 transitions, 8440 flow [2024-06-14 13:57:04,110 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:04,110 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:04,110 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:04,110 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-14 13:57:04,110 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)] === [2024-06-14 13:57:04,111 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:04,111 INFO L85 PathProgramCache]: Analyzing trace with hash 2037921392, now seen corresponding path program 1 times [2024-06-14 13:57:04,111 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:04,111 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785989320] [2024-06-14 13:57:04,111 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:04,111 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:04,119 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:04,419 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:04,420 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:04,420 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785989320] [2024-06-14 13:57:04,420 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785989320] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:04,420 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:04,420 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:04,420 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454919352] [2024-06-14 13:57:04,420 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:04,420 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:04,420 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:04,420 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:04,420 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:04,465 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:04,468 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 415 places, 570 transitions, 8440 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:04,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:04,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:04,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:05,485 INFO L124 PetriNetUnfolderBase]: 3006/5040 cut-off events. [2024-06-14 13:57:05,485 INFO L125 PetriNetUnfolderBase]: For 547889/547889 co-relation queries the response was YES. [2024-06-14 13:57:05,542 INFO L83 FinitePrefix]: Finished finitePrefix Result has 38626 conditions, 5040 events. 3006/5040 cut-off events. For 547889/547889 co-relation queries the response was YES. Maximal size of possible extension queue 409. Compared 33113 event pairs, 480 based on Foata normal form. 2/5028 useless extension candidates. Maximal degree in co-relation 38440. Up to 3891 conditions per place. [2024-06-14 13:57:05,561 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 411 selfloop transitions, 197 changer transitions 0/614 dead transitions. [2024-06-14 13:57:05,561 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 614 transitions, 10340 flow [2024-06-14 13:57:05,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:05,562 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:05,562 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:57:05,562 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:57:05,562 INFO L175 Difference]: Start difference. First operand has 415 places, 570 transitions, 8440 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:57:05,562 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 614 transitions, 10340 flow [2024-06-14 13:57:09,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 614 transitions, 10151 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-14 13:57:09,671 INFO L231 Difference]: Finished difference. Result has 418 places, 576 transitions, 8798 flow [2024-06-14 13:57:09,672 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8251, PETRI_DIFFERENCE_MINUEND_PLACES=410, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=570, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=193, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=377, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8798, PETRI_PLACES=418, PETRI_TRANSITIONS=576} [2024-06-14 13:57:09,672 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-14 13:57:09,672 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 576 transitions, 8798 flow [2024-06-14 13:57:09,672 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:09,672 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:09,673 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:09,673 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-14 13:57:09,673 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)] === [2024-06-14 13:57:09,673 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:09,673 INFO L85 PathProgramCache]: Analyzing trace with hash 1098394760, now seen corresponding path program 2 times [2024-06-14 13:57:09,673 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:09,673 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [466723908] [2024-06-14 13:57:09,674 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:09,674 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:09,683 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:10,021 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:10,022 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:10,022 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [466723908] [2024-06-14 13:57:10,022 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [466723908] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:10,022 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:10,022 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:10,022 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854626071] [2024-06-14 13:57:10,022 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:10,022 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:10,022 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:10,022 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:10,023 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:10,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:10,080 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 418 places, 576 transitions, 8798 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:10,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:10,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:10,080 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:11,101 INFO L124 PetriNetUnfolderBase]: 3073/5141 cut-off events. [2024-06-14 13:57:11,101 INFO L125 PetriNetUnfolderBase]: For 616526/616526 co-relation queries the response was YES. [2024-06-14 13:57:11,158 INFO L83 FinitePrefix]: Finished finitePrefix Result has 40692 conditions, 5141 events. 3073/5141 cut-off events. For 616526/616526 co-relation queries the response was YES. Maximal size of possible extension queue 416. Compared 33731 event pairs, 472 based on Foata normal form. 2/5129 useless extension candidates. Maximal degree in co-relation 40505. Up to 3935 conditions per place. [2024-06-14 13:57:11,177 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 411 selfloop transitions, 201 changer transitions 0/618 dead transitions. [2024-06-14 13:57:11,177 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 618 transitions, 10696 flow [2024-06-14 13:57:11,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:11,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:11,178 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-14 13:57:11,178 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-14 13:57:11,178 INFO L175 Difference]: Start difference. First operand has 418 places, 576 transitions, 8798 flow. Second operand 8 states and 196 transitions. [2024-06-14 13:57:11,178 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 618 transitions, 10696 flow [2024-06-14 13:57:14,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 618 transitions, 10380 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-14 13:57:14,625 INFO L231 Difference]: Finished difference. Result has 423 places, 580 transitions, 8993 flow [2024-06-14 13:57:14,625 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8510, PETRI_DIFFERENCE_MINUEND_PLACES=415, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=576, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=197, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=379, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=8993, PETRI_PLACES=423, PETRI_TRANSITIONS=580} [2024-06-14 13:57:14,626 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-14 13:57:14,626 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 580 transitions, 8993 flow [2024-06-14 13:57:14,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:14,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:14,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:14,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-14 13:57:14,626 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)] === [2024-06-14 13:57:14,627 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:14,627 INFO L85 PathProgramCache]: Analyzing trace with hash 496766866, now seen corresponding path program 3 times [2024-06-14 13:57:14,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:14,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1492984407] [2024-06-14 13:57:14,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:14,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:14,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:14,951 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:14,951 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:14,951 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1492984407] [2024-06-14 13:57:14,951 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1492984407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:14,951 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:14,951 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:14,952 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1788907249] [2024-06-14 13:57:14,952 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:14,952 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:14,952 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:14,952 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:14,952 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:15,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:15,003 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 423 places, 580 transitions, 8993 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:15,003 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:15,003 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:15,003 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:16,034 INFO L124 PetriNetUnfolderBase]: 3094/5167 cut-off events. [2024-06-14 13:57:16,034 INFO L125 PetriNetUnfolderBase]: For 638783/638783 co-relation queries the response was YES. [2024-06-14 13:57:16,093 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41545 conditions, 5167 events. 3094/5167 cut-off events. For 638783/638783 co-relation queries the response was YES. Maximal size of possible extension queue 421. Compared 34020 event pairs, 615 based on Foata normal form. 2/5150 useless extension candidates. Maximal degree in co-relation 41356. Up to 4357 conditions per place. [2024-06-14 13:57:16,290 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 424 selfloop transitions, 187 changer transitions 0/617 dead transitions. [2024-06-14 13:57:16,290 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 617 transitions, 10615 flow [2024-06-14 13:57:16,290 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:16,290 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:16,291 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 13:57:16,291 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-14 13:57:16,291 INFO L175 Difference]: Start difference. First operand has 423 places, 580 transitions, 8993 flow. Second operand 8 states and 191 transitions. [2024-06-14 13:57:16,291 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 617 transitions, 10615 flow [2024-06-14 13:57:18,911 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 617 transitions, 10239 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-14 13:57:18,920 INFO L231 Difference]: Finished difference. Result has 428 places, 584 transitions, 9117 flow [2024-06-14 13:57:18,921 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8623, PETRI_DIFFERENCE_MINUEND_PLACES=419, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=580, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=393, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9117, PETRI_PLACES=428, PETRI_TRANSITIONS=584} [2024-06-14 13:57:18,921 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-14 13:57:18,921 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 584 transitions, 9117 flow [2024-06-14 13:57:18,921 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:18,921 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:18,922 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:18,922 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-14 13:57:18,922 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)] === [2024-06-14 13:57:18,922 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:18,922 INFO L85 PathProgramCache]: Analyzing trace with hash 497063536, now seen corresponding path program 4 times [2024-06-14 13:57:18,923 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:18,923 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [91038029] [2024-06-14 13:57:18,923 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:18,923 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:18,932 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:19,345 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:19,345 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:19,345 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [91038029] [2024-06-14 13:57:19,346 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [91038029] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:19,346 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:19,346 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:19,346 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [428192140] [2024-06-14 13:57:19,346 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:19,346 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:19,347 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:19,347 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:19,347 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:19,406 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:19,406 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 428 places, 584 transitions, 9117 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:19,406 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:19,406 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:19,406 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:20,443 INFO L124 PetriNetUnfolderBase]: 3102/5184 cut-off events. [2024-06-14 13:57:20,443 INFO L125 PetriNetUnfolderBase]: For 650896/650896 co-relation queries the response was YES. [2024-06-14 13:57:20,506 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41783 conditions, 5184 events. 3102/5184 cut-off events. For 650896/650896 co-relation queries the response was YES. Maximal size of possible extension queue 423. Compared 34143 event pairs, 622 based on Foata normal form. 2/5172 useless extension candidates. Maximal degree in co-relation 41592. Up to 4404 conditions per place. [2024-06-14 13:57:20,527 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 424 selfloop transitions, 184 changer transitions 0/614 dead transitions. [2024-06-14 13:57:20,527 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 614 transitions, 10459 flow [2024-06-14 13:57:20,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:20,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:20,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:57:20,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 13:57:20,528 INFO L175 Difference]: Start difference. First operand has 428 places, 584 transitions, 9117 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:57:20,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 614 transitions, 10459 flow [2024-06-14 13:57:24,676 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 614 transitions, 10017 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-14 13:57:24,683 INFO L231 Difference]: Finished difference. Result has 431 places, 586 transitions, 9108 flow [2024-06-14 13:57:24,684 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8697, PETRI_DIFFERENCE_MINUEND_PLACES=423, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=584, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=400, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9108, PETRI_PLACES=431, PETRI_TRANSITIONS=586} [2024-06-14 13:57:24,684 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-14 13:57:24,684 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 586 transitions, 9108 flow [2024-06-14 13:57:24,684 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:24,684 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:24,684 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:24,684 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-14 13:57:24,684 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)] === [2024-06-14 13:57:24,684 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:24,684 INFO L85 PathProgramCache]: Analyzing trace with hash 1693173360, now seen corresponding path program 5 times [2024-06-14 13:57:24,685 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:24,685 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [962843571] [2024-06-14 13:57:24,685 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:24,685 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:24,693 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:25,015 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:25,016 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:25,016 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [962843571] [2024-06-14 13:57:25,016 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [962843571] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:25,016 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:25,016 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:25,016 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [95155759] [2024-06-14 13:57:25,016 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:25,016 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:25,016 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:25,016 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:25,016 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:25,060 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:25,060 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 431 places, 586 transitions, 9108 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:25,060 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:25,060 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:25,060 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:26,074 INFO L124 PetriNetUnfolderBase]: 3110/5196 cut-off events. [2024-06-14 13:57:26,075 INFO L125 PetriNetUnfolderBase]: For 661013/661013 co-relation queries the response was YES. [2024-06-14 13:57:26,135 INFO L83 FinitePrefix]: Finished finitePrefix Result has 41802 conditions, 5196 events. 3110/5196 cut-off events. For 661013/661013 co-relation queries the response was YES. Maximal size of possible extension queue 425. Compared 34262 event pairs, 622 based on Foata normal form. 2/5184 useless extension candidates. Maximal degree in co-relation 41610. Up to 4416 conditions per place. [2024-06-14 13:57:26,154 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 423 selfloop transitions, 184 changer transitions 0/613 dead transitions. [2024-06-14 13:57:26,155 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 613 transitions, 10422 flow [2024-06-14 13:57:26,155 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:26,155 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:26,155 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 13:57:26,156 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:57:26,156 INFO L175 Difference]: Start difference. First operand has 431 places, 586 transitions, 9108 flow. Second operand 8 states and 184 transitions. [2024-06-14 13:57:26,156 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 613 transitions, 10422 flow [2024-06-14 13:57:28,815 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 613 transitions, 10037 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:57:28,822 INFO L231 Difference]: Finished difference. Result has 433 places, 588 transitions, 9138 flow [2024-06-14 13:57:28,822 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8723, PETRI_DIFFERENCE_MINUEND_PLACES=425, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=586, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=182, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=402, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9138, PETRI_PLACES=433, PETRI_TRANSITIONS=588} [2024-06-14 13:57:28,822 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-14 13:57:28,822 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 588 transitions, 9138 flow [2024-06-14 13:57:28,822 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:28,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:28,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:28,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-14 13:57:28,823 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)] === [2024-06-14 13:57:28,823 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:28,823 INFO L85 PathProgramCache]: Analyzing trace with hash 1690316400, now seen corresponding path program 6 times [2024-06-14 13:57:28,823 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:28,823 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [872785648] [2024-06-14 13:57:28,823 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:28,823 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:28,829 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:29,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:29,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:29,133 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [872785648] [2024-06-14 13:57:29,133 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [872785648] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:29,133 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:29,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:29,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041991346] [2024-06-14 13:57:29,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:29,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:29,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:29,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:29,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:29,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:29,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 433 places, 588 transitions, 9138 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:29,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:29,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:29,191 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:30,358 INFO L124 PetriNetUnfolderBase]: 3177/5295 cut-off events. [2024-06-14 13:57:30,358 INFO L125 PetriNetUnfolderBase]: For 734738/734738 co-relation queries the response was YES. [2024-06-14 13:57:30,413 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43629 conditions, 5295 events. 3177/5295 cut-off events. For 734738/734738 co-relation queries the response was YES. Maximal size of possible extension queue 430. Compared 34901 event pairs, 633 based on Foata normal form. 2/5281 useless extension candidates. Maximal degree in co-relation 43436. Up to 4436 conditions per place. [2024-06-14 13:57:30,431 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 425 selfloop transitions, 191 changer transitions 0/622 dead transitions. [2024-06-14 13:57:30,431 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 622 transitions, 10774 flow [2024-06-14 13:57:30,432 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:30,432 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:30,432 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-14 13:57:30,432 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-14 13:57:30,432 INFO L175 Difference]: Start difference. First operand has 433 places, 588 transitions, 9138 flow. Second operand 8 states and 189 transitions. [2024-06-14 13:57:30,432 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 622 transitions, 10774 flow [2024-06-14 13:57:34,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 622 transitions, 10385 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-14 13:57:34,118 INFO L231 Difference]: Finished difference. Result has 436 places, 592 transitions, 9242 flow [2024-06-14 13:57:34,119 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8749, PETRI_DIFFERENCE_MINUEND_PLACES=427, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=588, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=187, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=397, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9242, PETRI_PLACES=436, PETRI_TRANSITIONS=592} [2024-06-14 13:57:34,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-14 13:57:34,119 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 592 transitions, 9242 flow [2024-06-14 13:57:34,119 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:34,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:34,119 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:34,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-14 13:57:34,119 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)] === [2024-06-14 13:57:34,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:34,120 INFO L85 PathProgramCache]: Analyzing trace with hash 1110622165, now seen corresponding path program 1 times [2024-06-14 13:57:34,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:34,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [769199800] [2024-06-14 13:57:34,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:34,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:34,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:34,432 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:34,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:34,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [769199800] [2024-06-14 13:57:34,433 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [769199800] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:34,433 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:34,433 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:57:34,433 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1114250628] [2024-06-14 13:57:34,433 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:34,433 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:57:34,433 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:34,433 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:57:34,433 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:57:34,471 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:34,472 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 436 places, 592 transitions, 9242 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:34,472 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:34,472 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:34,472 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:35,511 INFO L124 PetriNetUnfolderBase]: 3182/5332 cut-off events. [2024-06-14 13:57:35,511 INFO L125 PetriNetUnfolderBase]: For 743540/743551 co-relation queries the response was YES. [2024-06-14 13:57:35,574 INFO L83 FinitePrefix]: Finished finitePrefix Result has 43972 conditions, 5332 events. 3182/5332 cut-off events. For 743540/743551 co-relation queries the response was YES. Maximal size of possible extension queue 435. Compared 35377 event pairs, 662 based on Foata normal form. 9/5334 useless extension candidates. Maximal degree in co-relation 43777. Up to 4153 conditions per place. [2024-06-14 13:57:35,595 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 295 selfloop transitions, 320 changer transitions 0/621 dead transitions. [2024-06-14 13:57:35,595 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 621 transitions, 11044 flow [2024-06-14 13:57:35,596 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:57:35,596 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:57:35,596 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-14 13:57:35,596 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-14 13:57:35,596 INFO L175 Difference]: Start difference. First operand has 436 places, 592 transitions, 9242 flow. Second operand 8 states and 186 transitions. [2024-06-14 13:57:35,596 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 621 transitions, 11044 flow [2024-06-14 13:57:39,955 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 621 transitions, 10657 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:57:39,962 INFO L231 Difference]: Finished difference. Result has 439 places, 595 transitions, 9565 flow [2024-06-14 13:57:39,962 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8855, PETRI_DIFFERENCE_MINUEND_PLACES=431, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=592, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=317, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=275, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9565, PETRI_PLACES=439, PETRI_TRANSITIONS=595} [2024-06-14 13:57:39,962 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-14 13:57:39,962 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 595 transitions, 9565 flow [2024-06-14 13:57:39,962 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:39,963 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:39,963 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:39,963 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-14 13:57:39,963 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)] === [2024-06-14 13:57:39,963 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:39,963 INFO L85 PathProgramCache]: Analyzing trace with hash -567210987, now seen corresponding path program 2 times [2024-06-14 13:57:39,963 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:39,963 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1986872540] [2024-06-14 13:57:39,963 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:39,963 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:39,971 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:40,293 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:40,293 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:40,293 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1986872540] [2024-06-14 13:57:40,293 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1986872540] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:40,293 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:40,293 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:40,293 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1800693093] [2024-06-14 13:57:40,293 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:40,293 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:40,293 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:40,294 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:40,294 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:40,349 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:40,349 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 439 places, 595 transitions, 9565 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:40,349 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:40,349 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:40,349 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:41,443 INFO L124 PetriNetUnfolderBase]: 3187/5311 cut-off events. [2024-06-14 13:57:41,443 INFO L125 PetriNetUnfolderBase]: For 755408/755408 co-relation queries the response was YES. [2024-06-14 13:57:41,507 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44364 conditions, 5311 events. 3187/5311 cut-off events. For 755408/755408 co-relation queries the response was YES. Maximal size of possible extension queue 433. Compared 35058 event pairs, 666 based on Foata normal form. 1/5298 useless extension candidates. Maximal degree in co-relation 44168. Up to 4159 conditions per place. [2024-06-14 13:57:41,527 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 266 selfloop transitions, 356 changer transitions 0/628 dead transitions. [2024-06-14 13:57:41,528 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 628 transitions, 11401 flow [2024-06-14 13:57:41,528 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:57:41,528 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:57:41,528 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-14 13:57:41,528 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-14 13:57:41,528 INFO L175 Difference]: Start difference. First operand has 439 places, 595 transitions, 9565 flow. Second operand 9 states and 209 transitions. [2024-06-14 13:57:41,528 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 628 transitions, 11401 flow [2024-06-14 13:57:45,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 628 transitions, 10376 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-14 13:57:45,820 INFO L231 Difference]: Finished difference. Result has 441 places, 598 transitions, 9328 flow [2024-06-14 13:57:45,820 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8572, PETRI_DIFFERENCE_MINUEND_PLACES=432, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=595, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=353, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9328, PETRI_PLACES=441, PETRI_TRANSITIONS=598} [2024-06-14 13:57:45,821 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 399 predicate places. [2024-06-14 13:57:45,821 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 598 transitions, 9328 flow [2024-06-14 13:57:45,821 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:45,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:45,821 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:45,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-14 13:57:45,821 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)] === [2024-06-14 13:57:45,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:45,821 INFO L85 PathProgramCache]: Analyzing trace with hash -709594171, now seen corresponding path program 3 times [2024-06-14 13:57:45,821 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:45,821 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [229207560] [2024-06-14 13:57:45,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:45,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:45,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:46,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:46,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:46,131 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [229207560] [2024-06-14 13:57:46,131 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [229207560] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:46,131 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:46,131 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:46,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1489531268] [2024-06-14 13:57:46,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:46,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:46,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:46,132 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:46,132 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:46,191 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:46,191 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 441 places, 598 transitions, 9328 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:46,191 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:46,191 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:46,192 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:47,255 INFO L124 PetriNetUnfolderBase]: 3192/5320 cut-off events. [2024-06-14 13:57:47,255 INFO L125 PetriNetUnfolderBase]: For 764886/764886 co-relation queries the response was YES. [2024-06-14 13:57:47,320 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44224 conditions, 5320 events. 3192/5320 cut-off events. For 764886/764886 co-relation queries the response was YES. Maximal size of possible extension queue 436. Compared 35106 event pairs, 665 based on Foata normal form. 1/5307 useless extension candidates. Maximal degree in co-relation 44029. Up to 4165 conditions per place. [2024-06-14 13:57:47,341 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 266 selfloop transitions, 359 changer transitions 0/631 dead transitions. [2024-06-14 13:57:47,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 631 transitions, 11148 flow [2024-06-14 13:57:47,341 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:57:47,341 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:57:47,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-14 13:57:47,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-14 13:57:47,342 INFO L175 Difference]: Start difference. First operand has 441 places, 598 transitions, 9328 flow. Second operand 9 states and 211 transitions. [2024-06-14 13:57:47,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 631 transitions, 11148 flow [2024-06-14 13:57:50,977 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 631 transitions, 10600 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:57:50,985 INFO L231 Difference]: Finished difference. Result has 444 places, 601 transitions, 9548 flow [2024-06-14 13:57:50,985 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8783, PETRI_DIFFERENCE_MINUEND_PLACES=435, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=598, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=356, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=242, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9548, PETRI_PLACES=444, PETRI_TRANSITIONS=601} [2024-06-14 13:57:50,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-14 13:57:50,985 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 601 transitions, 9548 flow [2024-06-14 13:57:50,985 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:50,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:50,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:57:50,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-14 13:57:50,985 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)] === [2024-06-14 13:57:50,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:50,986 INFO L85 PathProgramCache]: Analyzing trace with hash 2010267305, now seen corresponding path program 4 times [2024-06-14 13:57:50,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:50,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1091296734] [2024-06-14 13:57:50,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:50,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:50,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:51,297 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:51,297 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:51,298 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1091296734] [2024-06-14 13:57:51,298 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1091296734] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:51,298 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:51,298 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:51,298 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [76544572] [2024-06-14 13:57:51,298 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:51,298 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:51,298 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:51,298 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:51,298 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:51,353 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:51,354 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 444 places, 601 transitions, 9548 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:51,354 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:51,354 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:51,354 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:52,555 INFO L124 PetriNetUnfolderBase]: 3197/5328 cut-off events. [2024-06-14 13:57:52,555 INFO L125 PetriNetUnfolderBase]: For 780223/780223 co-relation queries the response was YES. [2024-06-14 13:57:52,617 INFO L83 FinitePrefix]: Finished finitePrefix Result has 44497 conditions, 5328 events. 3197/5328 cut-off events. For 780223/780223 co-relation queries the response was YES. Maximal size of possible extension queue 437. Compared 35143 event pairs, 668 based on Foata normal form. 1/5315 useless extension candidates. Maximal degree in co-relation 44300. Up to 4171 conditions per place. [2024-06-14 13:57:52,638 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 268 selfloop transitions, 357 changer transitions 0/631 dead transitions. [2024-06-14 13:57:52,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 631 transitions, 11367 flow [2024-06-14 13:57:52,638 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:57:52,638 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:57:52,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-14 13:57:52,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-14 13:57:52,639 INFO L175 Difference]: Start difference. First operand has 444 places, 601 transitions, 9548 flow. Second operand 9 states and 208 transitions. [2024-06-14 13:57:52,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 631 transitions, 11367 flow [2024-06-14 13:57:56,598 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 631 transitions, 10615 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-14 13:57:56,605 INFO L231 Difference]: Finished difference. Result has 446 places, 604 transitions, 9563 flow [2024-06-14 13:57:56,605 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=8802, PETRI_DIFFERENCE_MINUEND_PLACES=437, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=601, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=354, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=9563, PETRI_PLACES=446, PETRI_TRANSITIONS=604} [2024-06-14 13:57:56,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-14 13:57:56,606 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 604 transitions, 9563 flow [2024-06-14 13:57:56,606 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:56,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:57:56,606 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, 1] [2024-06-14 13:57:56,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-14 13:57:56,606 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)] === [2024-06-14 13:57:56,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:57:56,606 INFO L85 PathProgramCache]: Analyzing trace with hash 2010072005, now seen corresponding path program 5 times [2024-06-14 13:57:56,606 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:57:56,606 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1595383910] [2024-06-14 13:57:56,606 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:57:56,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:57:56,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:57:56,916 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:57:56,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:57:56,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1595383910] [2024-06-14 13:57:56,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1595383910] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:57:56,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:57:56,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:57:56,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1133863323] [2024-06-14 13:57:56,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:57:56,916 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:57:56,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:57:56,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:57:56,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:57:56,954 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:57:56,954 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 446 places, 604 transitions, 9563 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:57:56,954 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:57:56,954 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:57:56,954 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:57:58,123 INFO L124 PetriNetUnfolderBase]: 3218/5367 cut-off events. [2024-06-14 13:57:58,123 INFO L125 PetriNetUnfolderBase]: For 806482/806482 co-relation queries the response was YES. [2024-06-14 13:57:58,186 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45037 conditions, 5367 events. 3218/5367 cut-off events. For 806482/806482 co-relation queries the response was YES. Maximal size of possible extension queue 443. Compared 35510 event pairs, 662 based on Foata normal form. 1/5354 useless extension candidates. Maximal degree in co-relation 44839. Up to 4195 conditions per place. [2024-06-14 13:57:58,206 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 271 selfloop transitions, 366 changer transitions 0/643 dead transitions. [2024-06-14 13:57:58,206 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 643 transitions, 11976 flow [2024-06-14 13:57:58,206 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:57:58,206 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:57:58,206 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-14 13:57:58,207 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585365853658537 [2024-06-14 13:57:58,207 INFO L175 Difference]: Start difference. First operand has 446 places, 604 transitions, 9563 flow. Second operand 10 states and 229 transitions. [2024-06-14 13:57:58,207 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 643 transitions, 11976 flow [2024-06-14 13:58:03,332 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 643 transitions, 11426 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 13:58:03,340 INFO L231 Difference]: Finished difference. Result has 450 places, 613 transitions, 9898 flow [2024-06-14 13:58:03,340 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9022, PETRI_DIFFERENCE_MINUEND_PLACES=440, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=604, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=357, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=247, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9898, PETRI_PLACES=450, PETRI_TRANSITIONS=613} [2024-06-14 13:58:03,341 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-14 13:58:03,341 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 613 transitions, 9898 flow [2024-06-14 13:58:03,341 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:03,341 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:03,341 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:03,341 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-14 13:58:03,341 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)] === [2024-06-14 13:58:03,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:03,341 INFO L85 PathProgramCache]: Analyzing trace with hash 1700535705, now seen corresponding path program 6 times [2024-06-14 13:58:03,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:03,342 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1817443449] [2024-06-14 13:58:03,342 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:03,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:03,348 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:03,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:03,656 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:03,656 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1817443449] [2024-06-14 13:58:03,656 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1817443449] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:03,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:03,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:58:03,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [818643280] [2024-06-14 13:58:03,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:03,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:58:03,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:03,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:58:03,656 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:58:03,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:03,723 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 450 places, 613 transitions, 9898 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:03,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:03,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:03,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:04,913 INFO L124 PetriNetUnfolderBase]: 3223/5372 cut-off events. [2024-06-14 13:58:04,913 INFO L125 PetriNetUnfolderBase]: For 822884/822884 co-relation queries the response was YES. [2024-06-14 13:58:04,986 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45318 conditions, 5372 events. 3223/5372 cut-off events. For 822884/822884 co-relation queries the response was YES. Maximal size of possible extension queue 442. Compared 35529 event pairs, 669 based on Foata normal form. 1/5359 useless extension candidates. Maximal degree in co-relation 45118. Up to 4201 conditions per place. [2024-06-14 13:58:05,008 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 267 selfloop transitions, 372 changer transitions 0/645 dead transitions. [2024-06-14 13:58:05,008 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 645 transitions, 11998 flow [2024-06-14 13:58:05,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:58:05,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:58:05,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-14 13:58:05,009 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-14 13:58:05,009 INFO L175 Difference]: Start difference. First operand has 450 places, 613 transitions, 9898 flow. Second operand 10 states and 226 transitions. [2024-06-14 13:58:05,009 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 645 transitions, 11998 flow [2024-06-14 13:58:09,445 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 645 transitions, 11184 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-14 13:58:09,453 INFO L231 Difference]: Finished difference. Result has 454 places, 616 transitions, 9890 flow [2024-06-14 13:58:09,453 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9110, PETRI_DIFFERENCE_MINUEND_PLACES=444, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=613, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=369, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=244, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9890, PETRI_PLACES=454, PETRI_TRANSITIONS=616} [2024-06-14 13:58:09,453 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-14 13:58:09,453 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 616 transitions, 9890 flow [2024-06-14 13:58:09,453 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:09,454 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:09,454 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, 1] [2024-06-14 13:58:09,454 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-14 13:58:09,454 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)] === [2024-06-14 13:58:09,454 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:09,454 INFO L85 PathProgramCache]: Analyzing trace with hash -385842670, now seen corresponding path program 7 times [2024-06-14 13:58:09,455 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:09,455 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1792660178] [2024-06-14 13:58:09,455 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:09,455 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:09,463 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:09,824 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:09,824 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:09,825 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1792660178] [2024-06-14 13:58:09,825 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1792660178] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:09,825 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:09,825 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:09,825 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332368319] [2024-06-14 13:58:09,825 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:09,825 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:09,825 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:09,825 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:09,825 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:09,887 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:09,887 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 454 places, 616 transitions, 9890 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:09,887 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:09,887 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:09,887 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:11,019 INFO L124 PetriNetUnfolderBase]: 3257/5437 cut-off events. [2024-06-14 13:58:11,019 INFO L125 PetriNetUnfolderBase]: For 870047/870047 co-relation queries the response was YES. [2024-06-14 13:58:11,086 INFO L83 FinitePrefix]: Finished finitePrefix Result has 46325 conditions, 5437 events. 3257/5437 cut-off events. For 870047/870047 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36120 event pairs, 593 based on Foata normal form. 2/5426 useless extension candidates. Maximal degree in co-relation 46124. Up to 4782 conditions per place. [2024-06-14 13:58:11,107 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 559 selfloop transitions, 87 changer transitions 0/652 dead transitions. [2024-06-14 13:58:11,107 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 652 transitions, 11656 flow [2024-06-14 13:58:11,107 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:11,107 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:11,108 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-14 13:58:11,108 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-14 13:58:11,108 INFO L175 Difference]: Start difference. First operand has 454 places, 616 transitions, 9890 flow. Second operand 8 states and 185 transitions. [2024-06-14 13:58:11,108 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 652 transitions, 11656 flow [2024-06-14 13:58:14,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 652 transitions, 10896 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-14 13:58:14,846 INFO L231 Difference]: Finished difference. Result has 455 places, 622 transitions, 9498 flow [2024-06-14 13:58:14,846 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9130, PETRI_DIFFERENCE_MINUEND_PLACES=446, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=616, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=529, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9498, PETRI_PLACES=455, PETRI_TRANSITIONS=622} [2024-06-14 13:58:14,847 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-14 13:58:14,847 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 622 transitions, 9498 flow [2024-06-14 13:58:14,847 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:14,847 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:14,847 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:14,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-14 13:58:14,848 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)] === [2024-06-14 13:58:14,848 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:14,848 INFO L85 PathProgramCache]: Analyzing trace with hash -377271790, now seen corresponding path program 8 times [2024-06-14 13:58:14,848 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:14,848 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1663107773] [2024-06-14 13:58:14,848 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:14,848 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:14,855 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:15,231 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:15,232 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:15,232 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1663107773] [2024-06-14 13:58:15,232 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1663107773] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:15,232 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:15,232 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:15,232 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1655029432] [2024-06-14 13:58:15,232 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:15,232 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:15,232 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:15,232 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:15,232 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:15,277 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:15,278 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 455 places, 622 transitions, 9498 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:15,278 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:15,278 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:15,278 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:16,376 INFO L124 PetriNetUnfolderBase]: 3252/5435 cut-off events. [2024-06-14 13:58:16,377 INFO L125 PetriNetUnfolderBase]: For 867990/867990 co-relation queries the response was YES. [2024-06-14 13:58:16,443 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45617 conditions, 5435 events. 3252/5435 cut-off events. For 867990/867990 co-relation queries the response was YES. Maximal size of possible extension queue 450. Compared 36134 event pairs, 599 based on Foata normal form. 2/5429 useless extension candidates. Maximal degree in co-relation 45414. Up to 4817 conditions per place. [2024-06-14 13:58:16,465 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 559 selfloop transitions, 82 changer transitions 0/647 dead transitions. [2024-06-14 13:58:16,465 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 647 transitions, 10842 flow [2024-06-14 13:58:16,465 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:16,465 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:16,466 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-14 13:58:16,466 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 13:58:16,466 INFO L175 Difference]: Start difference. First operand has 455 places, 622 transitions, 9498 flow. Second operand 8 states and 180 transitions. [2024-06-14 13:58:16,466 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 647 transitions, 10842 flow [2024-06-14 13:58:21,795 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 647 transitions, 10592 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-14 13:58:21,802 INFO L231 Difference]: Finished difference. Result has 458 places, 622 transitions, 9417 flow [2024-06-14 13:58:21,803 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9248, PETRI_DIFFERENCE_MINUEND_PLACES=450, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=82, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=540, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9417, PETRI_PLACES=458, PETRI_TRANSITIONS=622} [2024-06-14 13:58:21,803 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-14 13:58:21,803 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 622 transitions, 9417 flow [2024-06-14 13:58:21,803 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:21,803 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:21,803 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:21,803 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-14 13:58:21,803 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)] === [2024-06-14 13:58:21,804 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:21,804 INFO L85 PathProgramCache]: Analyzing trace with hash 578754696, now seen corresponding path program 9 times [2024-06-14 13:58:21,804 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:21,804 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1975800042] [2024-06-14 13:58:21,804 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:21,804 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:21,810 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:22,124 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:22,125 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:22,125 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1975800042] [2024-06-14 13:58:22,125 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1975800042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:22,125 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:22,125 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:22,125 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [350618508] [2024-06-14 13:58:22,125 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:22,125 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:22,125 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:22,125 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:22,125 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:22,170 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:22,171 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 458 places, 622 transitions, 9417 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:22,171 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:22,171 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:22,171 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:23,395 INFO L124 PetriNetUnfolderBase]: 3260/5447 cut-off events. [2024-06-14 13:58:23,395 INFO L125 PetriNetUnfolderBase]: For 880414/880414 co-relation queries the response was YES. [2024-06-14 13:58:23,463 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45610 conditions, 5447 events. 3260/5447 cut-off events. For 880414/880414 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 36175 event pairs, 599 based on Foata normal form. 2/5441 useless extension candidates. Maximal degree in co-relation 45406. Up to 4829 conditions per place. [2024-06-14 13:58:23,484 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 562 selfloop transitions, 83 changer transitions 0/651 dead transitions. [2024-06-14 13:58:23,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 651 transitions, 10811 flow [2024-06-14 13:58:23,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:58:23,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:58:23,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-14 13:58:23,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-14 13:58:23,485 INFO L175 Difference]: Start difference. First operand has 458 places, 622 transitions, 9417 flow. Second operand 10 states and 214 transitions. [2024-06-14 13:58:23,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 651 transitions, 10811 flow [2024-06-14 13:58:28,362 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 651 transitions, 10632 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-14 13:58:28,370 INFO L231 Difference]: Finished difference. Result has 462 places, 624 transitions, 9451 flow [2024-06-14 13:58:28,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9238, PETRI_DIFFERENCE_MINUEND_PLACES=452, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=622, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=81, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=539, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=9451, PETRI_PLACES=462, PETRI_TRANSITIONS=624} [2024-06-14 13:58:28,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-14 13:58:28,371 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 624 transitions, 9451 flow [2024-06-14 13:58:28,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:28,372 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:28,372 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:28,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-14 13:58:28,372 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)] === [2024-06-14 13:58:28,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:28,372 INFO L85 PathProgramCache]: Analyzing trace with hash 1568749994, now seen corresponding path program 10 times [2024-06-14 13:58:28,373 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:28,373 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1429152557] [2024-06-14 13:58:28,373 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:28,373 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:28,381 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:28,687 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:28,688 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:28,688 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1429152557] [2024-06-14 13:58:28,688 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1429152557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:28,688 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:28,688 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:28,688 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2064088407] [2024-06-14 13:58:28,688 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:28,688 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:28,688 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:28,688 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:28,689 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:28,727 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:28,728 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 624 transitions, 9451 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:28,728 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:28,728 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:28,728 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:30,049 INFO L124 PetriNetUnfolderBase]: 3268/5444 cut-off events. [2024-06-14 13:58:30,049 INFO L125 PetriNetUnfolderBase]: For 895747/895747 co-relation queries the response was YES. [2024-06-14 13:58:30,107 INFO L83 FinitePrefix]: Finished finitePrefix Result has 45795 conditions, 5444 events. 3268/5444 cut-off events. For 895747/895747 co-relation queries the response was YES. Maximal size of possible extension queue 451. Compared 36061 event pairs, 639 based on Foata normal form. 2/5432 useless extension candidates. Maximal degree in co-relation 45590. Up to 4648 conditions per place. [2024-06-14 13:58:30,125 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 459 selfloop transitions, 180 changer transitions 0/645 dead transitions. [2024-06-14 13:58:30,125 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 645 transitions, 10817 flow [2024-06-14 13:58:30,126 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:30,126 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:30,126 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-14 13:58:30,126 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-14 13:58:30,126 INFO L175 Difference]: Start difference. First operand has 462 places, 624 transitions, 9451 flow. Second operand 8 states and 179 transitions. [2024-06-14 13:58:30,126 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 645 transitions, 10817 flow [2024-06-14 13:58:34,739 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 645 transitions, 10630 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-14 13:58:34,746 INFO L231 Difference]: Finished difference. Result has 462 places, 626 transitions, 9675 flow [2024-06-14 13:58:34,746 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9264, PETRI_DIFFERENCE_MINUEND_PLACES=454, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=624, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=178, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=444, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9675, PETRI_PLACES=462, PETRI_TRANSITIONS=626} [2024-06-14 13:58:34,746 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-14 13:58:34,746 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 626 transitions, 9675 flow [2024-06-14 13:58:34,746 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:34,746 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:34,747 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:34,747 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-14 13:58:34,747 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)] === [2024-06-14 13:58:34,747 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:34,747 INFO L85 PathProgramCache]: Analyzing trace with hash -1783833710, now seen corresponding path program 11 times [2024-06-14 13:58:34,747 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:34,747 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [817625490] [2024-06-14 13:58:34,747 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:34,747 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:34,753 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:35,054 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:35,054 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:35,054 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [817625490] [2024-06-14 13:58:35,054 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [817625490] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:35,054 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:35,055 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:35,055 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [550004781] [2024-06-14 13:58:35,055 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:35,055 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:35,055 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:35,055 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:35,056 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:35,112 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:35,113 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 462 places, 626 transitions, 9675 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:35,113 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:35,113 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:35,113 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:36,250 INFO L124 PetriNetUnfolderBase]: 3348/5562 cut-off events. [2024-06-14 13:58:36,250 INFO L125 PetriNetUnfolderBase]: For 1001833/1001833 co-relation queries the response was YES. [2024-06-14 13:58:36,317 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48445 conditions, 5562 events. 3348/5562 cut-off events. For 1001833/1001833 co-relation queries the response was YES. Maximal size of possible extension queue 457. Compared 36822 event pairs, 651 based on Foata normal form. 2/5548 useless extension candidates. Maximal degree in co-relation 48239. Up to 4680 conditions per place. [2024-06-14 13:58:36,338 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 461 selfloop transitions, 189 changer transitions 0/656 dead transitions. [2024-06-14 13:58:36,338 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 656 transitions, 11439 flow [2024-06-14 13:58:36,338 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:36,339 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:36,339 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-14 13:58:36,339 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 13:58:36,339 INFO L175 Difference]: Start difference. First operand has 462 places, 626 transitions, 9675 flow. Second operand 8 states and 184 transitions. [2024-06-14 13:58:36,339 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 656 transitions, 11439 flow [2024-06-14 13:58:40,869 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 656 transitions, 11054 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-14 13:58:40,877 INFO L231 Difference]: Finished difference. Result has 465 places, 632 transitions, 9839 flow [2024-06-14 13:58:40,877 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9290, PETRI_DIFFERENCE_MINUEND_PLACES=456, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=626, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=437, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9839, PETRI_PLACES=465, PETRI_TRANSITIONS=632} [2024-06-14 13:58:40,877 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-14 13:58:40,877 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 632 transitions, 9839 flow [2024-06-14 13:58:40,877 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:40,877 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:40,877 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:40,878 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-14 13:58:40,878 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)] === [2024-06-14 13:58:40,878 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:40,878 INFO L85 PathProgramCache]: Analyzing trace with hash -1665685580, now seen corresponding path program 12 times [2024-06-14 13:58:40,878 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:40,878 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1357518487] [2024-06-14 13:58:40,878 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:40,878 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:40,884 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:41,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:41,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:41,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1357518487] [2024-06-14 13:58:41,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1357518487] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:41,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:41,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:41,207 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [143184455] [2024-06-14 13:58:41,207 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:41,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:41,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:41,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:41,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:41,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:41,254 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 465 places, 632 transitions, 9839 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:41,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:41,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:41,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:42,523 INFO L124 PetriNetUnfolderBase]: 3343/5572 cut-off events. [2024-06-14 13:58:42,523 INFO L125 PetriNetUnfolderBase]: For 1001931/1001931 co-relation queries the response was YES. [2024-06-14 13:58:42,587 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48445 conditions, 5572 events. 3343/5572 cut-off events. For 1001931/1001931 co-relation queries the response was YES. Maximal size of possible extension queue 459. Compared 37054 event pairs, 614 based on Foata normal form. 2/5566 useless extension candidates. Maximal degree in co-relation 48237. Up to 4972 conditions per place. [2024-06-14 13:58:42,606 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 574 selfloop transitions, 71 changer transitions 0/651 dead transitions. [2024-06-14 13:58:42,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 651 transitions, 11175 flow [2024-06-14 13:58:42,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:42,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:42,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-14 13:58:42,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-14 13:58:42,607 INFO L175 Difference]: Start difference. First operand has 465 places, 632 transitions, 9839 flow. Second operand 8 states and 174 transitions. [2024-06-14 13:58:42,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 651 transitions, 11175 flow [2024-06-14 13:58:46,872 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 651 transitions, 10780 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-14 13:58:46,879 INFO L231 Difference]: Finished difference. Result has 468 places, 632 transitions, 9591 flow [2024-06-14 13:58:46,879 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9444, PETRI_DIFFERENCE_MINUEND_PLACES=460, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=561, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9591, PETRI_PLACES=468, PETRI_TRANSITIONS=632} [2024-06-14 13:58:46,880 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-14 13:58:46,880 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 632 transitions, 9591 flow [2024-06-14 13:58:46,880 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:46,880 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:46,880 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:46,880 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-14 13:58:46,880 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)] === [2024-06-14 13:58:46,880 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:46,880 INFO L85 PathProgramCache]: Analyzing trace with hash -1735589840, now seen corresponding path program 1 times [2024-06-14 13:58:46,880 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:46,880 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [203553468] [2024-06-14 13:58:46,880 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:46,881 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:46,887 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:47,246 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:47,246 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:47,247 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [203553468] [2024-06-14 13:58:47,247 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [203553468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:47,247 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:47,247 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:47,247 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648424550] [2024-06-14 13:58:47,247 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:47,247 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:47,247 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:47,247 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:47,247 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:47,295 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:47,295 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 468 places, 632 transitions, 9591 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:47,295 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:47,295 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:47,295 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:48,645 INFO L124 PetriNetUnfolderBase]: 3351/5585 cut-off events. [2024-06-14 13:58:48,645 INFO L125 PetriNetUnfolderBase]: For 1015207/1015207 co-relation queries the response was YES. [2024-06-14 13:58:48,707 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48245 conditions, 5585 events. 3351/5585 cut-off events. For 1015207/1015207 co-relation queries the response was YES. Maximal size of possible extension queue 461. Compared 37127 event pairs, 613 based on Foata normal form. 2/5579 useless extension candidates. Maximal degree in co-relation 48036. Up to 4987 conditions per place. [2024-06-14 13:58:48,727 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 582 selfloop transitions, 68 changer transitions 0/656 dead transitions. [2024-06-14 13:58:48,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 656 transitions, 10977 flow [2024-06-14 13:58:48,728 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 13:58:48,728 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 13:58:48,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-14 13:58:48,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 13:58:48,728 INFO L175 Difference]: Start difference. First operand has 468 places, 632 transitions, 9591 flow. Second operand 8 states and 176 transitions. [2024-06-14 13:58:48,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 656 transitions, 10977 flow [2024-06-14 13:58:54,137 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 656 transitions, 10844 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-14 13:58:54,144 INFO L231 Difference]: Finished difference. Result has 471 places, 634 transitions, 9635 flow [2024-06-14 13:58:54,144 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9458, PETRI_DIFFERENCE_MINUEND_PLACES=463, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=632, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=564, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=9635, PETRI_PLACES=471, PETRI_TRANSITIONS=634} [2024-06-14 13:58:54,144 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-14 13:58:54,145 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 634 transitions, 9635 flow [2024-06-14 13:58:54,145 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:54,145 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:58:54,145 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:58:54,145 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-14 13:58:54,145 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)] === [2024-06-14 13:58:54,145 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:58:54,145 INFO L85 PathProgramCache]: Analyzing trace with hash -856570991, now seen corresponding path program 7 times [2024-06-14 13:58:54,145 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:58:54,146 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [789281646] [2024-06-14 13:58:54,146 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:58:54,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:58:54,154 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:58:54,476 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:58:54,476 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:58:54,476 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [789281646] [2024-06-14 13:58:54,476 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [789281646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:58:54,476 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:58:54,476 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:58:54,477 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [297709791] [2024-06-14 13:58:54,477 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:58:54,477 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:58:54,477 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:58:54,477 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:58:54,477 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:58:54,519 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:58:54,520 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 471 places, 634 transitions, 9635 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:58:54,520 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:58:54,520 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:58:54,520 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:58:55,738 INFO L124 PetriNetUnfolderBase]: 3380/5645 cut-off events. [2024-06-14 13:58:55,738 INFO L125 PetriNetUnfolderBase]: For 1050483/1050500 co-relation queries the response was YES. [2024-06-14 13:58:55,811 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49084 conditions, 5645 events. 3380/5645 cut-off events. For 1050483/1050500 co-relation queries the response was YES. Maximal size of possible extension queue 466. Compared 37735 event pairs, 643 based on Foata normal form. 13/5652 useless extension candidates. Maximal degree in co-relation 48874. Up to 4542 conditions per place. [2024-06-14 13:58:55,833 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 346 selfloop transitions, 325 changer transitions 0/677 dead transitions. [2024-06-14 13:58:55,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 677 transitions, 12016 flow [2024-06-14 13:58:55,833 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:58:55,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:58:55,834 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-14 13:58:55,834 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-14 13:58:55,834 INFO L175 Difference]: Start difference. First operand has 471 places, 634 transitions, 9635 flow. Second operand 9 states and 210 transitions. [2024-06-14 13:58:55,834 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 677 transitions, 12016 flow [2024-06-14 13:59:02,772 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 677 transitions, 11863 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:59:02,780 INFO L231 Difference]: Finished difference. Result has 474 places, 646 transitions, 10357 flow [2024-06-14 13:59:02,780 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9482, PETRI_DIFFERENCE_MINUEND_PLACES=465, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=634, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=313, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=321, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10357, PETRI_PLACES=474, PETRI_TRANSITIONS=646} [2024-06-14 13:59:02,780 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-14 13:59:02,781 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 646 transitions, 10357 flow [2024-06-14 13:59:02,781 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:02,781 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:02,781 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:02,781 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-14 13:59:02,781 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)] === [2024-06-14 13:59:02,781 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:02,781 INFO L85 PathProgramCache]: Analyzing trace with hash -1008483209, now seen corresponding path program 8 times [2024-06-14 13:59:02,781 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:02,781 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [583236764] [2024-06-14 13:59:02,781 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:02,781 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:02,789 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:03,132 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:03,132 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:03,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [583236764] [2024-06-14 13:59:03,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [583236764] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:03,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:03,133 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:59:03,133 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1772715409] [2024-06-14 13:59:03,133 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:03,133 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:59:03,133 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:03,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:59:03,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:59:03,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:03,203 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 474 places, 646 transitions, 10357 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:03,203 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:03,203 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:03,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:04,505 INFO L124 PetriNetUnfolderBase]: 3401/5675 cut-off events. [2024-06-14 13:59:04,505 INFO L125 PetriNetUnfolderBase]: For 1081231/1081237 co-relation queries the response was YES. [2024-06-14 13:59:04,582 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50300 conditions, 5675 events. 3401/5675 cut-off events. For 1081231/1081237 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37865 event pairs, 596 based on Foata normal form. 5/5678 useless extension candidates. Maximal degree in co-relation 50089. Up to 4566 conditions per place. [2024-06-14 13:59:04,605 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 339 selfloop transitions, 347 changer transitions 0/692 dead transitions. [2024-06-14 13:59:04,605 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 692 transitions, 12737 flow [2024-06-14 13:59:04,605 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:59:04,605 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:59:04,606 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 266 transitions. [2024-06-14 13:59:04,606 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-14 13:59:04,606 INFO L175 Difference]: Start difference. First operand has 474 places, 646 transitions, 10357 flow. Second operand 12 states and 266 transitions. [2024-06-14 13:59:04,606 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 692 transitions, 12737 flow [2024-06-14 13:59:10,558 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 692 transitions, 12038 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-14 13:59:10,566 INFO L231 Difference]: Finished difference. Result has 480 places, 655 transitions, 10526 flow [2024-06-14 13:59:10,566 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9676, PETRI_DIFFERENCE_MINUEND_PLACES=468, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=646, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=308, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10526, PETRI_PLACES=480, PETRI_TRANSITIONS=655} [2024-06-14 13:59:10,566 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-14 13:59:10,566 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 655 transitions, 10526 flow [2024-06-14 13:59:10,566 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:10,566 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:10,567 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:10,567 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-14 13:59:10,567 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)] === [2024-06-14 13:59:10,567 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:10,567 INFO L85 PathProgramCache]: Analyzing trace with hash -205497535, now seen corresponding path program 9 times [2024-06-14 13:59:10,567 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:10,567 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729836735] [2024-06-14 13:59:10,567 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:10,567 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:10,574 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:10,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:10,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:10,879 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729836735] [2024-06-14 13:59:10,879 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729836735] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:10,879 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:10,880 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 13:59:10,880 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1620057638] [2024-06-14 13:59:10,880 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:10,880 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 13:59:10,880 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:10,880 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 13:59:10,880 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-14 13:59:10,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:10,925 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 480 places, 655 transitions, 10526 flow. Second operand has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:10,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:10,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:10,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:12,229 INFO L124 PetriNetUnfolderBase]: 3398/5676 cut-off events. [2024-06-14 13:59:12,229 INFO L125 PetriNetUnfolderBase]: For 1093611/1093628 co-relation queries the response was YES. [2024-06-14 13:59:12,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50295 conditions, 5676 events. 3398/5676 cut-off events. For 1093611/1093628 co-relation queries the response was YES. Maximal size of possible extension queue 469. Compared 37992 event pairs, 643 based on Foata normal form. 13/5683 useless extension candidates. Maximal degree in co-relation 50083. Up to 4563 conditions per place. [2024-06-14 13:59:12,323 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 340 selfloop transitions, 338 changer transitions 0/684 dead transitions. [2024-06-14 13:59:12,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 684 transitions, 12708 flow [2024-06-14 13:59:12,324 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 13:59:12,324 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 13:59:12,324 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-14 13:59:12,324 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-14 13:59:12,324 INFO L175 Difference]: Start difference. First operand has 480 places, 655 transitions, 10526 flow. Second operand 10 states and 226 transitions. [2024-06-14 13:59:12,324 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 684 transitions, 12708 flow [2024-06-14 13:59:17,363 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 684 transitions, 12065 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-14 13:59:17,371 INFO L231 Difference]: Finished difference. Result has 482 places, 655 transitions, 10565 flow [2024-06-14 13:59:17,371 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9883, PETRI_DIFFERENCE_MINUEND_PLACES=472, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=338, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=317, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10565, PETRI_PLACES=482, PETRI_TRANSITIONS=655} [2024-06-14 13:59:17,371 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-14 13:59:17,371 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 655 transitions, 10565 flow [2024-06-14 13:59:17,371 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.25) internal successors, (122), 8 states have internal predecessors, (122), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:17,371 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:17,371 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:17,372 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-14 13:59:17,372 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)] === [2024-06-14 13:59:17,372 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:17,372 INFO L85 PathProgramCache]: Analyzing trace with hash -1183982579, now seen corresponding path program 10 times [2024-06-14 13:59:17,372 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:17,372 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1846677950] [2024-06-14 13:59:17,372 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:17,372 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:17,378 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:17,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:17,710 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:17,710 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1846677950] [2024-06-14 13:59:17,710 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1846677950] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:17,710 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:17,710 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-14 13:59:17,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1016816196] [2024-06-14 13:59:17,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:17,711 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-14 13:59:17,711 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:17,711 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-14 13:59:17,711 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-14 13:59:17,799 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:17,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 482 places, 655 transitions, 10565 flow. Second operand has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:17,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:17,800 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:17,800 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:19,170 INFO L124 PetriNetUnfolderBase]: 3395/5655 cut-off events. [2024-06-14 13:59:19,170 INFO L125 PetriNetUnfolderBase]: For 1099166/1099166 co-relation queries the response was YES. [2024-06-14 13:59:19,237 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50258 conditions, 5655 events. 3395/5655 cut-off events. For 1099166/1099166 co-relation queries the response was YES. Maximal size of possible extension queue 468. Compared 37686 event pairs, 633 based on Foata normal form. 1/5648 useless extension candidates. Maximal degree in co-relation 50045. Up to 4560 conditions per place. [2024-06-14 13:59:19,258 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 346 selfloop transitions, 337 changer transitions 0/689 dead transitions. [2024-06-14 13:59:19,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 689 transitions, 12777 flow [2024-06-14 13:59:19,258 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:59:19,258 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:59:19,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-14 13:59:19,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-14 13:59:19,259 INFO L175 Difference]: Start difference. First operand has 482 places, 655 transitions, 10565 flow. Second operand 9 states and 214 transitions. [2024-06-14 13:59:19,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 689 transitions, 12777 flow [2024-06-14 13:59:25,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 689 transitions, 12103 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-14 13:59:25,429 INFO L231 Difference]: Finished difference. Result has 484 places, 655 transitions, 10571 flow [2024-06-14 13:59:25,430 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9891, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=337, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=318, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10571, PETRI_PLACES=484, PETRI_TRANSITIONS=655} [2024-06-14 13:59:25,430 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-14 13:59:25,430 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 655 transitions, 10571 flow [2024-06-14 13:59:25,430 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 10 states, 10 states have (on average 14.8) internal successors, (148), 10 states have internal predecessors, (148), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:25,430 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:25,430 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:25,430 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-14 13:59:25,430 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)] === [2024-06-14 13:59:25,430 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:25,431 INFO L85 PathProgramCache]: Analyzing trace with hash -377266675, now seen corresponding path program 11 times [2024-06-14 13:59:25,431 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:25,431 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [879097361] [2024-06-14 13:59:25,431 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:25,431 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:25,437 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:25,744 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:25,744 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:25,745 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [879097361] [2024-06-14 13:59:25,745 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [879097361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:25,745 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:25,745 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:25,745 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [934028360] [2024-06-14 13:59:25,745 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:25,745 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:25,745 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:25,745 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:25,745 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:25,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:25,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 484 places, 655 transitions, 10571 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:25,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:25,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:25,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:27,275 INFO L124 PetriNetUnfolderBase]: 3408/5677 cut-off events. [2024-06-14 13:59:27,275 INFO L125 PetriNetUnfolderBase]: For 1124034/1124034 co-relation queries the response was YES. [2024-06-14 13:59:27,340 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50611 conditions, 5677 events. 3408/5677 cut-off events. For 1124034/1124034 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 37898 event pairs, 633 based on Foata normal form. 1/5670 useless extension candidates. Maximal degree in co-relation 50397. Up to 4896 conditions per place. [2024-06-14 13:59:27,360 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 487 selfloop transitions, 194 changer transitions 0/687 dead transitions. [2024-06-14 13:59:27,360 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 687 transitions, 12327 flow [2024-06-14 13:59:27,360 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:59:27,360 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:59:27,360 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-14 13:59:27,360 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-14 13:59:27,361 INFO L175 Difference]: Start difference. First operand has 484 places, 655 transitions, 10571 flow. Second operand 9 states and 204 transitions. [2024-06-14 13:59:27,361 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 687 transitions, 12327 flow [2024-06-14 13:59:33,588 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 687 transitions, 11616 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-14 13:59:33,597 INFO L231 Difference]: Finished difference. Result has 485 places, 661 transitions, 10348 flow [2024-06-14 13:59:33,597 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9872, PETRI_DIFFERENCE_MINUEND_PLACES=475, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=655, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=188, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=461, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10348, PETRI_PLACES=485, PETRI_TRANSITIONS=661} [2024-06-14 13:59:33,598 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-14 13:59:33,598 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 661 transitions, 10348 flow [2024-06-14 13:59:33,598 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:33,598 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:33,598 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:33,598 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-14 13:59:33,598 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)] === [2024-06-14 13:59:33,599 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:33,599 INFO L85 PathProgramCache]: Analyzing trace with hash -377261095, now seen corresponding path program 12 times [2024-06-14 13:59:33,599 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:33,599 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [830514767] [2024-06-14 13:59:33,599 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:33,599 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:33,608 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:33,925 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:33,925 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:33,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [830514767] [2024-06-14 13:59:33,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [830514767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:33,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:33,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:33,926 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1612112637] [2024-06-14 13:59:33,926 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:33,926 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:33,926 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:33,926 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:33,926 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:33,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:33,989 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 485 places, 661 transitions, 10348 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:33,990 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:33,990 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:33,990 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:35,450 INFO L124 PetriNetUnfolderBase]: 3405/5673 cut-off events. [2024-06-14 13:59:35,450 INFO L125 PetriNetUnfolderBase]: For 1130149/1130149 co-relation queries the response was YES. [2024-06-14 13:59:35,517 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50217 conditions, 5673 events. 3405/5673 cut-off events. For 1130149/1130149 co-relation queries the response was YES. Maximal size of possible extension queue 470. Compared 37858 event pairs, 633 based on Foata normal form. 1/5666 useless extension candidates. Maximal degree in co-relation 50001. Up to 4899 conditions per place. [2024-06-14 13:59:35,538 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 491 selfloop transitions, 189 changer transitions 0/686 dead transitions. [2024-06-14 13:59:35,538 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 686 transitions, 11770 flow [2024-06-14 13:59:35,538 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 13:59:35,538 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 13:59:35,538 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-14 13:59:35,539 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-14 13:59:35,539 INFO L175 Difference]: Start difference. First operand has 485 places, 661 transitions, 10348 flow. Second operand 9 states and 201 transitions. [2024-06-14 13:59:35,539 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 686 transitions, 11770 flow [2024-06-14 13:59:42,008 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 686 transitions, 11374 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-14 13:59:42,015 INFO L231 Difference]: Finished difference. Result has 488 places, 661 transitions, 10336 flow [2024-06-14 13:59:42,016 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9952, PETRI_DIFFERENCE_MINUEND_PLACES=479, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=189, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=472, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10336, PETRI_PLACES=488, PETRI_TRANSITIONS=661} [2024-06-14 13:59:42,016 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-14 13:59:42,016 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 661 transitions, 10336 flow [2024-06-14 13:59:42,016 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:42,016 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:42,016 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:42,016 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-14 13:59:42,016 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)] === [2024-06-14 13:59:42,016 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:42,017 INFO L85 PathProgramCache]: Analyzing trace with hash 546013879, now seen corresponding path program 13 times [2024-06-14 13:59:42,017 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:42,017 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [201984282] [2024-06-14 13:59:42,017 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:42,017 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:42,023 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:42,338 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:42,338 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:42,338 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [201984282] [2024-06-14 13:59:42,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [201984282] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:42,339 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:42,339 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:42,339 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647695760] [2024-06-14 13:59:42,339 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:42,339 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:42,339 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:42,339 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:42,339 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:42,376 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:42,376 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 488 places, 661 transitions, 10336 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:42,376 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:42,376 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:42,376 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:43,953 INFO L124 PetriNetUnfolderBase]: 3418/5696 cut-off events. [2024-06-14 13:59:43,953 INFO L125 PetriNetUnfolderBase]: For 1155729/1155729 co-relation queries the response was YES. [2024-06-14 13:59:44,019 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50594 conditions, 5696 events. 3418/5696 cut-off events. For 1155729/1155729 co-relation queries the response was YES. Maximal size of possible extension queue 472. Compared 38104 event pairs, 632 based on Foata normal form. 1/5689 useless extension candidates. Maximal degree in co-relation 50377. Up to 4908 conditions per place. [2024-06-14 13:59:44,040 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 493 selfloop transitions, 198 changer transitions 0/697 dead transitions. [2024-06-14 13:59:44,040 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 697 transitions, 12156 flow [2024-06-14 13:59:44,041 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 13:59:44,041 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 13:59:44,041 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 270 transitions. [2024-06-14 13:59:44,042 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065666041275797 [2024-06-14 13:59:44,042 INFO L175 Difference]: Start difference. First operand has 488 places, 661 transitions, 10336 flow. Second operand 13 states and 270 transitions. [2024-06-14 13:59:44,042 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 697 transitions, 12156 flow [2024-06-14 13:59:49,889 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 697 transitions, 11774 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-14 13:59:49,897 INFO L231 Difference]: Finished difference. Result has 494 places, 667 transitions, 10483 flow [2024-06-14 13:59:49,897 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=9954, PETRI_DIFFERENCE_MINUEND_PLACES=480, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=661, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=192, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=463, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10483, PETRI_PLACES=494, PETRI_TRANSITIONS=667} [2024-06-14 13:59:49,897 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-14 13:59:49,897 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 667 transitions, 10483 flow [2024-06-14 13:59:49,898 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:49,898 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:49,898 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 13:59:49,898 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-14 13:59:49,898 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)] === [2024-06-14 13:59:49,898 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:49,898 INFO L85 PathProgramCache]: Analyzing trace with hash -90027805, now seen corresponding path program 14 times [2024-06-14 13:59:49,898 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:49,898 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1717047631] [2024-06-14 13:59:49,898 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:49,899 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:49,905 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:50,220 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:50,220 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:50,220 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1717047631] [2024-06-14 13:59:50,220 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1717047631] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:50,220 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:50,220 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:50,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1441759305] [2024-06-14 13:59:50,221 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:50,221 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:50,221 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:50,221 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:50,221 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:50,287 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:50,287 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 494 places, 667 transitions, 10483 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:50,287 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:50,287 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:50,287 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:51,863 INFO L124 PetriNetUnfolderBase]: 3423/5705 cut-off events. [2024-06-14 13:59:51,864 INFO L125 PetriNetUnfolderBase]: For 1172989/1172989 co-relation queries the response was YES. [2024-06-14 13:59:51,931 INFO L83 FinitePrefix]: Finished finitePrefix Result has 50849 conditions, 5705 events. 3423/5705 cut-off events. For 1172989/1172989 co-relation queries the response was YES. Maximal size of possible extension queue 473. Compared 38142 event pairs, 632 based on Foata normal form. 1/5698 useless extension candidates. Maximal degree in co-relation 50630. Up to 4914 conditions per place. [2024-06-14 13:59:51,953 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 495 selfloop transitions, 201 changer transitions 0/702 dead transitions. [2024-06-14 13:59:51,953 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 702 transitions, 12275 flow [2024-06-14 13:59:51,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 13:59:51,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 13:59:51,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 304 transitions. [2024-06-14 13:59:51,954 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943089430894309 [2024-06-14 13:59:51,954 INFO L175 Difference]: Start difference. First operand has 494 places, 667 transitions, 10483 flow. Second operand 15 states and 304 transitions. [2024-06-14 13:59:51,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 702 transitions, 12275 flow [2024-06-14 13:59:57,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 702 transitions, 11809 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-14 13:59:57,306 INFO L231 Difference]: Finished difference. Result has 499 places, 670 transitions, 10487 flow [2024-06-14 13:59:57,306 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10044, PETRI_DIFFERENCE_MINUEND_PLACES=484, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=667, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=198, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=469, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=10487, PETRI_PLACES=499, PETRI_TRANSITIONS=670} [2024-06-14 13:59:57,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-14 13:59:57,307 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 670 transitions, 10487 flow [2024-06-14 13:59:57,307 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:57,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 13:59:57,307 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] [2024-06-14 13:59:57,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-14 13:59:57,307 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)] === [2024-06-14 13:59:57,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 13:59:57,307 INFO L85 PathProgramCache]: Analyzing trace with hash 539948419, now seen corresponding path program 15 times [2024-06-14 13:59:57,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 13:59:57,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [335460299] [2024-06-14 13:59:57,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 13:59:57,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 13:59:57,314 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 13:59:57,623 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 13:59:57,623 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 13:59:57,624 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [335460299] [2024-06-14 13:59:57,624 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [335460299] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 13:59:57,624 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 13:59:57,624 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 13:59:57,624 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1085477551] [2024-06-14 13:59:57,624 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 13:59:57,624 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 13:59:57,624 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 13:59:57,624 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 13:59:57,624 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 13:59:57,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 13:59:57,682 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 670 transitions, 10487 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 13:59:57,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 13:59:57,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 13:59:57,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 13:59:58,982 INFO L124 PetriNetUnfolderBase]: 3444/5741 cut-off events. [2024-06-14 13:59:58,983 INFO L125 PetriNetUnfolderBase]: For 1207943/1207943 co-relation queries the response was YES. [2024-06-14 13:59:59,058 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51406 conditions, 5741 events. 3444/5741 cut-off events. For 1207943/1207943 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38424 event pairs, 630 based on Foata normal form. 1/5734 useless extension candidates. Maximal degree in co-relation 51186. Up to 4920 conditions per place. [2024-06-14 13:59:59,080 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 486 selfloop transitions, 217 changer transitions 0/709 dead transitions. [2024-06-14 13:59:59,080 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 709 transitions, 12670 flow [2024-06-14 13:59:59,080 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 13:59:59,080 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 13:59:59,081 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-06-14 13:59:59,081 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264227642276422 [2024-06-14 13:59:59,081 INFO L175 Difference]: Start difference. First operand has 499 places, 670 transitions, 10487 flow. Second operand 12 states and 259 transitions. [2024-06-14 13:59:59,081 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 709 transitions, 12670 flow [2024-06-14 14:00:04,695 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 709 transitions, 12260 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-14 14:00:04,703 INFO L231 Difference]: Finished difference. Result has 499 places, 679 transitions, 10730 flow [2024-06-14 14:00:04,703 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10077, PETRI_DIFFERENCE_MINUEND_PLACES=486, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=670, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=211, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=456, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10730, PETRI_PLACES=499, PETRI_TRANSITIONS=679} [2024-06-14 14:00:04,704 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-14 14:00:04,704 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 679 transitions, 10730 flow [2024-06-14 14:00:04,704 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:04,704 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:04,704 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:04,704 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-14 14:00:04,704 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)] === [2024-06-14 14:00:04,704 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:04,704 INFO L85 PathProgramCache]: Analyzing trace with hash -90379345, now seen corresponding path program 16 times [2024-06-14 14:00:04,704 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:04,705 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035319369] [2024-06-14 14:00:04,705 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:04,705 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:04,712 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:05,027 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:05,027 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:05,027 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035319369] [2024-06-14 14:00:05,027 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035319369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:05,027 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:05,027 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:05,027 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [434572581] [2024-06-14 14:00:05,027 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:05,028 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:05,028 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:05,028 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:05,028 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:05,088 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:05,088 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 499 places, 679 transitions, 10730 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:05,088 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:05,088 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:05,089 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:06,520 INFO L124 PetriNetUnfolderBase]: 3441/5737 cut-off events. [2024-06-14 14:00:06,520 INFO L125 PetriNetUnfolderBase]: For 1216751/1216751 co-relation queries the response was YES. [2024-06-14 14:00:06,598 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51468 conditions, 5737 events. 3441/5737 cut-off events. For 1216751/1216751 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38408 event pairs, 630 based on Foata normal form. 1/5730 useless extension candidates. Maximal degree in co-relation 51246. Up to 4917 conditions per place. [2024-06-14 14:00:06,621 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 488 selfloop transitions, 217 changer transitions 0/711 dead transitions. [2024-06-14 14:00:06,622 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 711 transitions, 12748 flow [2024-06-14 14:00:06,622 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 14:00:06,622 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 14:00:06,622 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 295 transitions. [2024-06-14 14:00:06,622 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5139372822299652 [2024-06-14 14:00:06,623 INFO L175 Difference]: Start difference. First operand has 499 places, 679 transitions, 10730 flow. Second operand 14 states and 295 transitions. [2024-06-14 14:00:06,623 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 711 transitions, 12748 flow [2024-06-14 14:00:12,414 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 711 transitions, 12432 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-14 14:00:12,422 INFO L231 Difference]: Finished difference. Result has 506 places, 679 transitions, 10854 flow [2024-06-14 14:00:12,423 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10414, PETRI_DIFFERENCE_MINUEND_PLACES=492, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=217, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=462, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10854, PETRI_PLACES=506, PETRI_TRANSITIONS=679} [2024-06-14 14:00:12,423 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-14 14:00:12,423 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 679 transitions, 10854 flow [2024-06-14 14:00:12,423 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:12,423 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:12,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:12,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-14 14:00:12,423 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)] === [2024-06-14 14:00:12,424 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:12,424 INFO L85 PathProgramCache]: Analyzing trace with hash -90195205, now seen corresponding path program 17 times [2024-06-14 14:00:12,424 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:12,424 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633032854] [2024-06-14 14:00:12,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:12,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:12,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:12,742 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:12,742 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:12,742 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633032854] [2024-06-14 14:00:12,742 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633032854] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:12,742 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:12,742 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:12,742 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1093548304] [2024-06-14 14:00:12,742 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:12,743 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:12,743 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:12,743 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:12,743 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:12,821 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:12,821 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 679 transitions, 10854 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:12,821 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:12,821 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:12,821 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:14,277 INFO L124 PetriNetUnfolderBase]: 3438/5733 cut-off events. [2024-06-14 14:00:14,277 INFO L125 PetriNetUnfolderBase]: For 1224680/1224680 co-relation queries the response was YES. [2024-06-14 14:00:14,354 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51771 conditions, 5733 events. 3438/5733 cut-off events. For 1224680/1224680 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38360 event pairs, 630 based on Foata normal form. 1/5726 useless extension candidates. Maximal degree in co-relation 51547. Up to 4914 conditions per place. [2024-06-14 14:00:14,376 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 483 selfloop transitions, 220 changer transitions 0/709 dead transitions. [2024-06-14 14:00:14,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 709 transitions, 12600 flow [2024-06-14 14:00:14,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:00:14,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:00:14,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-06-14 14:00:14,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5140712945590994 [2024-06-14 14:00:14,377 INFO L175 Difference]: Start difference. First operand has 506 places, 679 transitions, 10854 flow. Second operand 13 states and 274 transitions. [2024-06-14 14:00:14,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 709 transitions, 12600 flow [2024-06-14 14:00:21,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 709 transitions, 12120 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-14 14:00:21,262 INFO L231 Difference]: Finished difference. Result has 506 places, 679 transitions, 10820 flow [2024-06-14 14:00:21,263 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10374, PETRI_DIFFERENCE_MINUEND_PLACES=493, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=220, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=459, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=10820, PETRI_PLACES=506, PETRI_TRANSITIONS=679} [2024-06-14 14:00:21,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-14 14:00:21,263 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 679 transitions, 10820 flow [2024-06-14 14:00:21,263 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:21,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:21,264 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:21,264 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-14 14:00:21,264 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)] === [2024-06-14 14:00:21,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:21,264 INFO L85 PathProgramCache]: Analyzing trace with hash -90373765, now seen corresponding path program 18 times [2024-06-14 14:00:21,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:21,265 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [77577850] [2024-06-14 14:00:21,265 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:21,265 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:21,273 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:21,591 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:21,592 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:21,592 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [77577850] [2024-06-14 14:00:21,592 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [77577850] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:21,592 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:21,592 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:21,592 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1296189038] [2024-06-14 14:00:21,592 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:21,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:21,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:21,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:21,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:21,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:21,655 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 679 transitions, 10820 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:21,655 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:21,655 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:21,655 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:23,064 INFO L124 PetriNetUnfolderBase]: 3435/5727 cut-off events. [2024-06-14 14:00:23,065 INFO L125 PetriNetUnfolderBase]: For 1232737/1232737 co-relation queries the response was YES. [2024-06-14 14:00:23,138 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51702 conditions, 5727 events. 3435/5727 cut-off events. For 1232737/1232737 co-relation queries the response was YES. Maximal size of possible extension queue 476. Compared 38284 event pairs, 633 based on Foata normal form. 1/5720 useless extension candidates. Maximal degree in co-relation 51478. Up to 4941 conditions per place. [2024-06-14 14:00:23,158 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 510 selfloop transitions, 190 changer transitions 0/706 dead transitions. [2024-06-14 14:00:23,158 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 706 transitions, 12286 flow [2024-06-14 14:00:23,159 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:00:23,159 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:00:23,159 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-14 14:00:23,159 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277161862527716 [2024-06-14 14:00:23,159 INFO L175 Difference]: Start difference. First operand has 506 places, 679 transitions, 10820 flow. Second operand 11 states and 238 transitions. [2024-06-14 14:00:23,159 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 706 transitions, 12286 flow [2024-06-14 14:00:30,476 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 706 transitions, 11820 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-14 14:00:30,484 INFO L231 Difference]: Finished difference. Result has 505 places, 679 transitions, 10740 flow [2024-06-14 14:00:30,485 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10354, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=489, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=10740, PETRI_PLACES=505, PETRI_TRANSITIONS=679} [2024-06-14 14:00:30,485 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-14 14:00:30,485 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 679 transitions, 10740 flow [2024-06-14 14:00:30,486 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:30,486 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:30,486 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:30,486 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-14 14:00:30,486 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)] === [2024-06-14 14:00:30,486 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:30,486 INFO L85 PathProgramCache]: Analyzing trace with hash -1204553108, now seen corresponding path program 2 times [2024-06-14 14:00:30,487 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:30,487 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490919755] [2024-06-14 14:00:30,487 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:30,487 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:30,495 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:30,830 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:30,830 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:30,830 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490919755] [2024-06-14 14:00:30,830 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490919755] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:30,830 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:30,830 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:00:30,830 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [974645837] [2024-06-14 14:00:30,830 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:30,831 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:00:30,831 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:30,831 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:00:30,831 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:00:30,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:30,869 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 505 places, 679 transitions, 10740 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:30,869 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:30,869 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:30,869 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:32,238 INFO L124 PetriNetUnfolderBase]: 3443/5746 cut-off events. [2024-06-14 14:00:32,238 INFO L125 PetriNetUnfolderBase]: For 1259355/1259355 co-relation queries the response was YES. [2024-06-14 14:00:32,312 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51854 conditions, 5746 events. 3443/5746 cut-off events. For 1259355/1259355 co-relation queries the response was YES. Maximal size of possible extension queue 478. Compared 38538 event pairs, 611 based on Foata normal form. 2/5740 useless extension candidates. Maximal degree in co-relation 51629. Up to 5116 conditions per place. [2024-06-14 14:00:32,333 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 627 selfloop transitions, 68 changer transitions 0/701 dead transitions. [2024-06-14 14:00:32,333 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 701 transitions, 12214 flow [2024-06-14 14:00:32,334 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:00:32,334 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:00:32,334 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-14 14:00:32,334 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-14 14:00:32,334 INFO L175 Difference]: Start difference. First operand has 505 places, 679 transitions, 10740 flow. Second operand 9 states and 191 transitions. [2024-06-14 14:00:32,334 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 701 transitions, 12214 flow [2024-06-14 14:00:39,091 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 701 transitions, 11818 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 14:00:39,099 INFO L231 Difference]: Finished difference. Result has 503 places, 681 transitions, 10525 flow [2024-06-14 14:00:39,099 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10344, PETRI_DIFFERENCE_MINUEND_PLACES=494, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=679, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=66, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=611, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=10525, PETRI_PLACES=503, PETRI_TRANSITIONS=681} [2024-06-14 14:00:39,099 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 461 predicate places. [2024-06-14 14:00:39,099 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 681 transitions, 10525 flow [2024-06-14 14:00:39,100 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:39,100 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:39,100 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:39,100 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-14 14:00:39,100 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)] === [2024-06-14 14:00:39,100 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:39,100 INFO L85 PathProgramCache]: Analyzing trace with hash -1773614405, now seen corresponding path program 19 times [2024-06-14 14:00:39,100 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:39,100 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2059437977] [2024-06-14 14:00:39,100 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:39,100 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:39,107 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:39,409 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:39,409 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:39,409 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2059437977] [2024-06-14 14:00:39,410 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2059437977] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:39,410 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:39,410 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:39,410 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2129984653] [2024-06-14 14:00:39,410 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:39,410 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:39,410 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:39,410 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:39,410 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:39,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:39,459 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 503 places, 681 transitions, 10525 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:39,459 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:39,459 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:39,459 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:40,915 INFO L124 PetriNetUnfolderBase]: 3464/5752 cut-off events. [2024-06-14 14:00:40,915 INFO L125 PetriNetUnfolderBase]: For 1287758/1287758 co-relation queries the response was YES. [2024-06-14 14:00:40,994 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52183 conditions, 5752 events. 3464/5752 cut-off events. For 1287758/1287758 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 38359 event pairs, 705 based on Foata normal form. 1/5739 useless extension candidates. Maximal degree in co-relation 51957. Up to 4528 conditions per place. [2024-06-14 14:00:41,016 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 412 changer transitions 0/713 dead transitions. [2024-06-14 14:00:41,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 713 transitions, 12962 flow [2024-06-14 14:00:41,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:00:41,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:00:41,018 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-14 14:00:41,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414634146341464 [2024-06-14 14:00:41,018 INFO L175 Difference]: Start difference. First operand has 503 places, 681 transitions, 10525 flow. Second operand 10 states and 222 transitions. [2024-06-14 14:00:41,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 713 transitions, 12962 flow [2024-06-14 14:00:49,374 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 713 transitions, 12805 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-14 14:00:49,382 INFO L231 Difference]: Finished difference. Result has 506 places, 690 transitions, 11345 flow [2024-06-14 14:00:49,382 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10368, PETRI_DIFFERENCE_MINUEND_PLACES=496, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=681, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=403, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=278, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=11345, PETRI_PLACES=506, PETRI_TRANSITIONS=690} [2024-06-14 14:00:49,382 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-14 14:00:49,382 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 690 transitions, 11345 flow [2024-06-14 14:00:49,382 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:49,382 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:49,382 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:49,382 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-14 14:00:49,382 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)] === [2024-06-14 14:00:49,383 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:49,383 INFO L85 PathProgramCache]: Analyzing trace with hash 1568760689, now seen corresponding path program 20 times [2024-06-14 14:00:49,383 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:49,383 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1747895622] [2024-06-14 14:00:49,383 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:49,383 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:49,389 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:49,692 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:49,693 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:49,693 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1747895622] [2024-06-14 14:00:49,693 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1747895622] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:49,693 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:49,693 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:49,693 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956639834] [2024-06-14 14:00:49,693 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:49,693 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:49,693 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:49,693 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:49,694 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:49,752 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:49,753 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 506 places, 690 transitions, 11345 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:49,753 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:49,753 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:49,753 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:00:51,157 INFO L124 PetriNetUnfolderBase]: 3461/5745 cut-off events. [2024-06-14 14:00:51,157 INFO L125 PetriNetUnfolderBase]: For 1300533/1300533 co-relation queries the response was YES. [2024-06-14 14:00:51,233 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52915 conditions, 5745 events. 3461/5745 cut-off events. For 1300533/1300533 co-relation queries the response was YES. Maximal size of possible extension queue 479. Compared 38306 event pairs, 708 based on Foata normal form. 1/5732 useless extension candidates. Maximal degree in co-relation 52688. Up to 4525 conditions per place. [2024-06-14 14:00:51,258 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 410 changer transitions 0/711 dead transitions. [2024-06-14 14:00:51,258 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 711 transitions, 13357 flow [2024-06-14 14:00:51,259 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:00:51,259 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:00:51,259 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-14 14:00:51,259 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-14 14:00:51,259 INFO L175 Difference]: Start difference. First operand has 506 places, 690 transitions, 11345 flow. Second operand 9 states and 203 transitions. [2024-06-14 14:00:51,259 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 711 transitions, 13357 flow [2024-06-14 14:00:58,506 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 711 transitions, 12730 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-14 14:00:58,515 INFO L231 Difference]: Finished difference. Result has 509 places, 690 transitions, 11544 flow [2024-06-14 14:00:58,515 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10718, PETRI_DIFFERENCE_MINUEND_PLACES=500, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=280, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11544, PETRI_PLACES=509, PETRI_TRANSITIONS=690} [2024-06-14 14:00:58,515 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-14 14:00:58,515 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 690 transitions, 11544 flow [2024-06-14 14:00:58,515 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:58,516 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:00:58,516 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:00:58,516 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-14 14:00:58,516 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)] === [2024-06-14 14:00:58,516 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:00:58,516 INFO L85 PathProgramCache]: Analyzing trace with hash -488635105, now seen corresponding path program 21 times [2024-06-14 14:00:58,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:00:58,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [46853574] [2024-06-14 14:00:58,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:00:58,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:00:58,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:00:58,902 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:00:58,902 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:00:58,902 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [46853574] [2024-06-14 14:00:58,902 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [46853574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:00:58,902 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:00:58,902 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:00:58,902 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [320534730] [2024-06-14 14:00:58,902 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:00:58,903 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:00:58,903 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:00:58,903 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:00:58,903 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:00:58,965 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:00:58,965 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 509 places, 690 transitions, 11544 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:00:58,965 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:00:58,966 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:00:58,966 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:00,470 INFO L124 PetriNetUnfolderBase]: 3466/5779 cut-off events. [2024-06-14 14:01:00,470 INFO L125 PetriNetUnfolderBase]: For 1321132/1321132 co-relation queries the response was YES. [2024-06-14 14:01:00,547 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53172 conditions, 5779 events. 3466/5779 cut-off events. For 1321132/1321132 co-relation queries the response was YES. Maximal size of possible extension queue 482. Compared 38750 event pairs, 667 based on Foata normal form. 1/5766 useless extension candidates. Maximal degree in co-relation 52943. Up to 4531 conditions per place. [2024-06-14 14:01:00,570 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 423 changer transitions 0/719 dead transitions. [2024-06-14 14:01:00,570 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 719 transitions, 14473 flow [2024-06-14 14:01:00,571 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:01:00,571 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:01:00,571 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-14 14:01:00,572 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541019955654102 [2024-06-14 14:01:00,572 INFO L175 Difference]: Start difference. First operand has 509 places, 690 transitions, 11544 flow. Second operand 11 states and 244 transitions. [2024-06-14 14:01:00,572 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 719 transitions, 14473 flow [2024-06-14 14:01:07,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 719 transitions, 13643 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-14 14:01:07,816 INFO L231 Difference]: Finished difference. Result has 513 places, 693 transitions, 11619 flow [2024-06-14 14:01:07,816 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10720, PETRI_DIFFERENCE_MINUEND_PLACES=502, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=690, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=420, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=270, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11619, PETRI_PLACES=513, PETRI_TRANSITIONS=693} [2024-06-14 14:01:07,816 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-14 14:01:07,817 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 693 transitions, 11619 flow [2024-06-14 14:01:07,817 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:07,817 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:07,817 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:07,817 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-14 14:01:07,817 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)] === [2024-06-14 14:01:07,817 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:07,817 INFO L85 PathProgramCache]: Analyzing trace with hash -1665328925, now seen corresponding path program 22 times [2024-06-14 14:01:07,817 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:07,817 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1659753452] [2024-06-14 14:01:07,817 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:07,817 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:07,824 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:08,138 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:08,138 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:08,138 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1659753452] [2024-06-14 14:01:08,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1659753452] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:08,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:08,139 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:08,139 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1661403036] [2024-06-14 14:01:08,139 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:08,139 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:08,139 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:08,139 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:08,139 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:08,201 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:08,201 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 513 places, 693 transitions, 11619 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:08,201 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:08,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:08,202 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:09,695 INFO L124 PetriNetUnfolderBase]: 3487/5815 cut-off events. [2024-06-14 14:01:09,695 INFO L125 PetriNetUnfolderBase]: For 1358686/1358686 co-relation queries the response was YES. [2024-06-14 14:01:09,772 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53840 conditions, 5815 events. 3487/5815 cut-off events. For 1358686/1358686 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 39020 event pairs, 632 based on Foata normal form. 1/5808 useless extension candidates. Maximal degree in co-relation 53610. Up to 5045 conditions per place. [2024-06-14 14:01:09,794 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 557 selfloop transitions, 165 changer transitions 0/728 dead transitions. [2024-06-14 14:01:09,795 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 728 transitions, 13869 flow [2024-06-14 14:01:09,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 14:01:09,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 14:01:09,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 283 transitions. [2024-06-14 14:01:09,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930313588850174 [2024-06-14 14:01:09,796 INFO L175 Difference]: Start difference. First operand has 513 places, 693 transitions, 11619 flow. Second operand 14 states and 283 transitions. [2024-06-14 14:01:09,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 728 transitions, 13869 flow [2024-06-14 14:01:18,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 728 transitions, 12634 flow, removed 60 selfloop flow, removed 9 redundant places. [2024-06-14 14:01:18,085 INFO L231 Difference]: Finished difference. Result has 520 places, 702 transitions, 10932 flow [2024-06-14 14:01:18,086 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10442, PETRI_DIFFERENCE_MINUEND_PLACES=504, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=693, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=156, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=10932, PETRI_PLACES=520, PETRI_TRANSITIONS=702} [2024-06-14 14:01:18,086 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 478 predicate places. [2024-06-14 14:01:18,086 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 702 transitions, 10932 flow [2024-06-14 14:01:18,086 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:18,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:18,086 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] [2024-06-14 14:01:18,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-14 14:01:18,086 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)] === [2024-06-14 14:01:18,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:18,087 INFO L85 PathProgramCache]: Analyzing trace with hash 1684403399, now seen corresponding path program 23 times [2024-06-14 14:01:18,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:18,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2128532260] [2024-06-14 14:01:18,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:18,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:18,095 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:18,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:18,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:18,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2128532260] [2024-06-14 14:01:18,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2128532260] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:18,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:18,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:18,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1240885515] [2024-06-14 14:01:18,474 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:18,474 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:18,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:18,474 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:18,474 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:18,577 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:18,578 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 520 places, 702 transitions, 10932 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:18,578 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:18,578 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:18,578 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:20,047 INFO L124 PetriNetUnfolderBase]: 3484/5811 cut-off events. [2024-06-14 14:01:20,047 INFO L125 PetriNetUnfolderBase]: For 1359348/1359348 co-relation queries the response was YES. [2024-06-14 14:01:20,125 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52778 conditions, 5811 events. 3484/5811 cut-off events. For 1359348/1359348 co-relation queries the response was YES. Maximal size of possible extension queue 485. Compared 39046 event pairs, 632 based on Foata normal form. 1/5804 useless extension candidates. Maximal degree in co-relation 52547. Up to 5042 conditions per place. [2024-06-14 14:01:20,146 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 554 selfloop transitions, 165 changer transitions 0/725 dead transitions. [2024-06-14 14:01:20,146 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 725 transitions, 12706 flow [2024-06-14 14:01:20,147 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:01:20,147 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:01:20,147 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-14 14:01:20,147 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-14 14:01:20,147 INFO L175 Difference]: Start difference. First operand has 520 places, 702 transitions, 10932 flow. Second operand 12 states and 248 transitions. [2024-06-14 14:01:20,147 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 725 transitions, 12706 flow [2024-06-14 14:01:28,507 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 725 transitions, 12340 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-14 14:01:28,516 INFO L231 Difference]: Finished difference. Result has 522 places, 702 transitions, 10902 flow [2024-06-14 14:01:28,516 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10566, PETRI_DIFFERENCE_MINUEND_PLACES=510, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=165, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=537, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=10902, PETRI_PLACES=522, PETRI_TRANSITIONS=702} [2024-06-14 14:01:28,516 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-14 14:01:28,516 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 702 transitions, 10902 flow [2024-06-14 14:01:28,517 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:28,517 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:28,517 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:28,517 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-14 14:01:28,517 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)] === [2024-06-14 14:01:28,517 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:28,517 INFO L85 PathProgramCache]: Analyzing trace with hash 1684046279, now seen corresponding path program 24 times [2024-06-14 14:01:28,517 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:28,517 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2047196543] [2024-06-14 14:01:28,517 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:28,517 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:28,524 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:28,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:28,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:28,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2047196543] [2024-06-14 14:01:28,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2047196543] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:28,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:28,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:28,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [737116144] [2024-06-14 14:01:28,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:28,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:28,827 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:28,827 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:28,827 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:28,879 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:28,879 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 522 places, 702 transitions, 10902 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:28,879 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:28,879 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:28,879 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:30,378 INFO L124 PetriNetUnfolderBase]: 3505/5852 cut-off events. [2024-06-14 14:01:30,378 INFO L125 PetriNetUnfolderBase]: For 1398145/1398145 co-relation queries the response was YES. [2024-06-14 14:01:30,459 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53353 conditions, 5852 events. 3505/5852 cut-off events. For 1398145/1398145 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 39397 event pairs, 623 based on Foata normal form. 1/5845 useless extension candidates. Maximal degree in co-relation 53121. Up to 5050 conditions per place. [2024-06-14 14:01:30,483 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 551 selfloop transitions, 177 changer transitions 0/734 dead transitions. [2024-06-14 14:01:30,483 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 734 transitions, 13130 flow [2024-06-14 14:01:30,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:01:30,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:01:30,484 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-14 14:01:30,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-14 14:01:30,485 INFO L175 Difference]: Start difference. First operand has 522 places, 702 transitions, 10902 flow. Second operand 11 states and 236 transitions. [2024-06-14 14:01:30,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 734 transitions, 13130 flow [2024-06-14 14:01:39,417 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 734 transitions, 12800 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-14 14:01:39,425 INFO L231 Difference]: Finished difference. Result has 523 places, 711 transitions, 11120 flow [2024-06-14 14:01:39,426 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10572, PETRI_DIFFERENCE_MINUEND_PLACES=511, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=702, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=171, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=528, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11120, PETRI_PLACES=523, PETRI_TRANSITIONS=711} [2024-06-14 14:01:39,426 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-14 14:01:39,426 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 711 transitions, 11120 flow [2024-06-14 14:01:39,426 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:39,426 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:39,426 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:39,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-14 14:01:39,426 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)] === [2024-06-14 14:01:39,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:39,426 INFO L85 PathProgramCache]: Analyzing trace with hash 1684230419, now seen corresponding path program 25 times [2024-06-14 14:01:39,427 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:39,427 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991750280] [2024-06-14 14:01:39,427 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:39,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:39,433 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:39,740 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:39,740 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:39,740 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991750280] [2024-06-14 14:01:39,741 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991750280] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:39,741 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:39,741 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:39,741 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [63545542] [2024-06-14 14:01:39,741 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:39,741 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:39,741 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:39,741 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:39,741 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:39,798 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:39,799 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 523 places, 711 transitions, 11120 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:39,799 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:39,799 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:39,799 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:41,317 INFO L124 PetriNetUnfolderBase]: 3518/5874 cut-off events. [2024-06-14 14:01:41,317 INFO L125 PetriNetUnfolderBase]: For 1428276/1428276 co-relation queries the response was YES. [2024-06-14 14:01:41,399 INFO L83 FinitePrefix]: Finished finitePrefix Result has 53885 conditions, 5874 events. 3518/5874 cut-off events. For 1428276/1428276 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 39537 event pairs, 623 based on Foata normal form. 1/5867 useless extension candidates. Maximal degree in co-relation 53651. Up to 5065 conditions per place. [2024-06-14 14:01:41,422 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 551 selfloop transitions, 185 changer transitions 0/742 dead transitions. [2024-06-14 14:01:41,422 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 742 transitions, 13348 flow [2024-06-14 14:01:41,422 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:01:41,422 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:01:41,422 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 269 transitions. [2024-06-14 14:01:41,422 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046904315196998 [2024-06-14 14:01:41,422 INFO L175 Difference]: Start difference. First operand has 523 places, 711 transitions, 11120 flow. Second operand 13 states and 269 transitions. [2024-06-14 14:01:41,423 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 742 transitions, 13348 flow [2024-06-14 14:01:50,210 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 742 transitions, 13136 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-14 14:01:50,218 INFO L231 Difference]: Finished difference. Result has 530 places, 717 transitions, 11410 flow [2024-06-14 14:01:50,218 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10908, PETRI_DIFFERENCE_MINUEND_PLACES=517, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=711, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=179, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=532, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11410, PETRI_PLACES=530, PETRI_TRANSITIONS=717} [2024-06-14 14:01:50,219 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-14 14:01:50,219 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 717 transitions, 11410 flow [2024-06-14 14:01:50,219 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:50,219 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:01:50,219 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:01:50,219 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-14 14:01:50,219 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)] === [2024-06-14 14:01:50,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:01:50,219 INFO L85 PathProgramCache]: Analyzing trace with hash 1684051859, now seen corresponding path program 26 times [2024-06-14 14:01:50,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:01:50,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [837148849] [2024-06-14 14:01:50,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:01:50,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:01:50,226 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:01:50,547 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:01:50,547 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:01:50,548 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [837148849] [2024-06-14 14:01:50,548 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [837148849] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:01:50,548 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:01:50,548 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:01:50,548 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2063248706] [2024-06-14 14:01:50,548 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:01:50,548 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:01:50,548 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:01:50,549 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:01:50,549 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:01:50,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:01:50,616 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 717 transitions, 11410 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:01:50,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:01:50,616 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:01:50,616 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:01:52,218 INFO L124 PetriNetUnfolderBase]: 3515/5863 cut-off events. [2024-06-14 14:01:52,219 INFO L125 PetriNetUnfolderBase]: For 1437357/1437357 co-relation queries the response was YES. [2024-06-14 14:01:52,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54196 conditions, 5863 events. 3515/5863 cut-off events. For 1437357/1437357 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 39414 event pairs, 633 based on Foata normal form. 1/5856 useless extension candidates. Maximal degree in co-relation 53960. Up to 5092 conditions per place. [2024-06-14 14:01:52,324 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 572 selfloop transitions, 158 changer transitions 0/736 dead transitions. [2024-06-14 14:01:52,324 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 736 transitions, 12916 flow [2024-06-14 14:01:52,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:01:52,325 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:01:52,325 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-14 14:01:52,325 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-14 14:01:52,325 INFO L175 Difference]: Start difference. First operand has 530 places, 717 transitions, 11410 flow. Second operand 9 states and 196 transitions. [2024-06-14 14:01:52,325 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 736 transitions, 12916 flow [2024-06-14 14:02:01,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 736 transitions, 12526 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-14 14:02:01,853 INFO L231 Difference]: Finished difference. Result has 530 places, 717 transitions, 11342 flow [2024-06-14 14:02:01,853 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11020, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=559, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11342, PETRI_PLACES=530, PETRI_TRANSITIONS=717} [2024-06-14 14:02:01,853 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-14 14:02:01,853 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 717 transitions, 11342 flow [2024-06-14 14:02:01,853 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:01,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:01,854 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:01,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-14 14:02:01,854 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)] === [2024-06-14 14:02:01,854 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:01,854 INFO L85 PathProgramCache]: Analyzing trace with hash -895750585, now seen corresponding path program 27 times [2024-06-14 14:02:01,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:01,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [690826924] [2024-06-14 14:02:01,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:01,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:01,864 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:02,171 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:02,172 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:02,172 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [690826924] [2024-06-14 14:02:02,172 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [690826924] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:02,172 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:02,172 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:02,172 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1815278281] [2024-06-14 14:02:02,172 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:02,172 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:02,172 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:02,173 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:02,173 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:02,236 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:02,236 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 530 places, 717 transitions, 11342 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:02,236 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:02,236 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:02,236 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:03,676 INFO L124 PetriNetUnfolderBase]: 3512/5866 cut-off events. [2024-06-14 14:02:03,676 INFO L125 PetriNetUnfolderBase]: For 1445336/1445336 co-relation queries the response was YES. [2024-06-14 14:02:03,759 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54059 conditions, 5866 events. 3512/5866 cut-off events. For 1445336/1445336 co-relation queries the response was YES. Maximal size of possible extension queue 496. Compared 39498 event pairs, 623 based on Foata normal form. 1/5859 useless extension candidates. Maximal degree in co-relation 53822. Up to 5059 conditions per place. [2024-06-14 14:02:03,783 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 552 selfloop transitions, 183 changer transitions 0/741 dead transitions. [2024-06-14 14:02:03,783 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 741 transitions, 13448 flow [2024-06-14 14:02:03,783 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:02:03,784 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:02:03,784 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-14 14:02:03,784 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142276422764228 [2024-06-14 14:02:03,784 INFO L175 Difference]: Start difference. First operand has 530 places, 717 transitions, 11342 flow. Second operand 12 states and 253 transitions. [2024-06-14 14:02:03,784 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 741 transitions, 13448 flow [2024-06-14 14:02:14,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 741 transitions, 13118 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-14 14:02:14,295 INFO L231 Difference]: Finished difference. Result has 534 places, 717 transitions, 11384 flow [2024-06-14 14:02:14,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=11012, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=183, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=534, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11384, PETRI_PLACES=534, PETRI_TRANSITIONS=717} [2024-06-14 14:02:14,295 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 492 predicate places. [2024-06-14 14:02:14,296 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 717 transitions, 11384 flow [2024-06-14 14:02:14,296 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:14,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:14,296 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] [2024-06-14 14:02:14,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-14 14:02:14,296 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)] === [2024-06-14 14:02:14,297 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:14,297 INFO L85 PathProgramCache]: Analyzing trace with hash 510216677, now seen corresponding path program 28 times [2024-06-14 14:02:14,297 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:14,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [361543990] [2024-06-14 14:02:14,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:14,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:14,306 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:14,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:14,630 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:14,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [361543990] [2024-06-14 14:02:14,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [361543990] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:14,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:14,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:14,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712866724] [2024-06-14 14:02:14,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:14,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:14,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:14,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:14,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:14,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:14,691 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 717 transitions, 11384 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:14,691 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:14,691 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:14,691 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:16,126 INFO L124 PetriNetUnfolderBase]: 3525/5870 cut-off events. [2024-06-14 14:02:16,126 INFO L125 PetriNetUnfolderBase]: For 1477281/1477281 co-relation queries the response was YES. [2024-06-14 14:02:16,214 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54506 conditions, 5870 events. 3525/5870 cut-off events. For 1477281/1477281 co-relation queries the response was YES. Maximal size of possible extension queue 492. Compared 39418 event pairs, 697 based on Foata normal form. 1/5857 useless extension candidates. Maximal degree in co-relation 54268. Up to 4600 conditions per place. [2024-06-14 14:02:16,240 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 288 selfloop transitions, 454 changer transitions 0/748 dead transitions. [2024-06-14 14:02:16,240 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 748 transitions, 14202 flow [2024-06-14 14:02:16,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:02:16,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:02:16,241 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-14 14:02:16,241 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532150776053215 [2024-06-14 14:02:16,241 INFO L175 Difference]: Start difference. First operand has 534 places, 717 transitions, 11384 flow. Second operand 11 states and 240 transitions. [2024-06-14 14:02:16,241 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 748 transitions, 14202 flow [2024-06-14 14:02:26,515 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 748 transitions, 13808 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-14 14:02:26,524 INFO L231 Difference]: Finished difference. Result has 534 places, 723 transitions, 12012 flow [2024-06-14 14:02:26,524 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10990, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=717, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=448, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=269, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=12012, PETRI_PLACES=534, PETRI_TRANSITIONS=723} [2024-06-14 14:02:26,524 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 492 predicate places. [2024-06-14 14:02:26,525 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 723 transitions, 12012 flow [2024-06-14 14:02:26,525 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:26,525 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:26,525 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:26,525 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-14 14:02:26,525 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)] === [2024-06-14 14:02:26,525 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:26,525 INFO L85 PathProgramCache]: Analyzing trace with hash -1659072815, now seen corresponding path program 29 times [2024-06-14 14:02:26,525 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:26,526 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [548020002] [2024-06-14 14:02:26,526 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:26,526 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:26,532 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:26,850 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:26,850 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:26,850 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [548020002] [2024-06-14 14:02:26,851 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [548020002] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:26,851 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:26,851 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:26,851 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [529572751] [2024-06-14 14:02:26,851 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:26,851 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:26,851 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:26,851 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:26,851 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:26,894 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:26,894 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 723 transitions, 12012 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:26,894 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:26,894 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:26,894 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:28,371 INFO L124 PetriNetUnfolderBase]: 3522/5881 cut-off events. [2024-06-14 14:02:28,371 INFO L125 PetriNetUnfolderBase]: For 1487613/1487613 co-relation queries the response was YES. [2024-06-14 14:02:28,457 INFO L83 FinitePrefix]: Finished finitePrefix Result has 55120 conditions, 5881 events. 3522/5881 cut-off events. For 1487613/1487613 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39587 event pairs, 629 based on Foata normal form. 1/5874 useless extension candidates. Maximal degree in co-relation 54881. Up to 5107 conditions per place. [2024-06-14 14:02:28,481 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 584 selfloop transitions, 155 changer transitions 0/745 dead transitions. [2024-06-14 14:02:28,481 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 745 transitions, 13836 flow [2024-06-14 14:02:28,482 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:02:28,482 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:02:28,482 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-14 14:02:28,482 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-14 14:02:28,482 INFO L175 Difference]: Start difference. First operand has 534 places, 723 transitions, 12012 flow. Second operand 11 states and 231 transitions. [2024-06-14 14:02:28,482 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 745 transitions, 13836 flow [2024-06-14 14:02:39,016 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 745 transitions, 12578 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-14 14:02:39,026 INFO L231 Difference]: Finished difference. Result has 535 places, 723 transitions, 11070 flow [2024-06-14 14:02:39,026 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10754, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11070, PETRI_PLACES=535, PETRI_TRANSITIONS=723} [2024-06-14 14:02:39,026 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-14 14:02:39,027 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 723 transitions, 11070 flow [2024-06-14 14:02:39,027 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:39,027 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:39,027 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:39,027 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-14 14:02:39,027 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)] === [2024-06-14 14:02:39,027 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:39,028 INFO L85 PathProgramCache]: Analyzing trace with hash -1437422195, now seen corresponding path program 30 times [2024-06-14 14:02:39,028 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:39,028 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [952705533] [2024-06-14 14:02:39,028 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:39,028 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:39,037 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:39,360 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:39,361 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:39,361 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [952705533] [2024-06-14 14:02:39,361 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [952705533] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:39,361 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:39,361 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:02:39,361 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1003518716] [2024-06-14 14:02:39,361 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:39,361 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:02:39,361 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:39,361 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:02:39,361 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:02:39,416 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:39,416 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 723 transitions, 11070 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:39,416 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:39,416 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:39,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:40,874 INFO L124 PetriNetUnfolderBase]: 3519/5877 cut-off events. [2024-06-14 14:02:40,874 INFO L125 PetriNetUnfolderBase]: For 1488717/1488717 co-relation queries the response was YES. [2024-06-14 14:02:40,963 INFO L83 FinitePrefix]: Finished finitePrefix Result has 54207 conditions, 5877 events. 3519/5877 cut-off events. For 1488717/1488717 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39605 event pairs, 629 based on Foata normal form. 1/5870 useless extension candidates. Maximal degree in co-relation 53968. Up to 5104 conditions per place. [2024-06-14 14:02:40,988 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 584 selfloop transitions, 155 changer transitions 0/745 dead transitions. [2024-06-14 14:02:40,988 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 745 transitions, 12600 flow [2024-06-14 14:02:40,988 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:02:40,989 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:02:40,989 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-06-14 14:02:40,989 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-14 14:02:40,989 INFO L175 Difference]: Start difference. First operand has 535 places, 723 transitions, 11070 flow. Second operand 12 states and 246 transitions. [2024-06-14 14:02:40,989 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 745 transitions, 12600 flow [2024-06-14 14:02:51,351 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 745 transitions, 12256 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-14 14:02:51,359 INFO L231 Difference]: Finished difference. Result has 537 places, 723 transitions, 11042 flow [2024-06-14 14:02:51,359 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10726, PETRI_DIFFERENCE_MINUEND_PLACES=525, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=155, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=568, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11042, PETRI_PLACES=537, PETRI_TRANSITIONS=723} [2024-06-14 14:02:51,360 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 495 predicate places. [2024-06-14 14:02:51,360 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 723 transitions, 11042 flow [2024-06-14 14:02:51,360 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:51,360 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:02:51,360 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:02:51,360 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-14 14:02:51,360 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)] === [2024-06-14 14:02:51,360 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:02:51,360 INFO L85 PathProgramCache]: Analyzing trace with hash -431696942, now seen corresponding path program 13 times [2024-06-14 14:02:51,360 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:02:51,360 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2040829076] [2024-06-14 14:02:51,361 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:02:51,361 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:02:51,367 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:02:51,701 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:02:51,702 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:02:51,702 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2040829076] [2024-06-14 14:02:51,702 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2040829076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:02:51,702 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:02:51,702 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:02:51,702 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [251341504] [2024-06-14 14:02:51,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:02:51,703 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:02:51,703 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:02:51,703 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:02:51,703 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:02:51,749 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:02:51,749 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 537 places, 723 transitions, 11042 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:02:51,749 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:02:51,749 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:02:51,749 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:02:53,220 INFO L124 PetriNetUnfolderBase]: 3496/5844 cut-off events. [2024-06-14 14:02:53,221 INFO L125 PetriNetUnfolderBase]: For 1496579/1496579 co-relation queries the response was YES. [2024-06-14 14:02:53,305 INFO L83 FinitePrefix]: Finished finitePrefix Result has 52611 conditions, 5844 events. 3496/5844 cut-off events. For 1496579/1496579 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39295 event pairs, 468 based on Foata normal form. 10/5846 useless extension candidates. Maximal degree in co-relation 52372. Up to 4574 conditions per place. [2024-06-14 14:02:53,330 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 566 selfloop transitions, 190 changer transitions 0/762 dead transitions. [2024-06-14 14:02:53,331 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 762 transitions, 13002 flow [2024-06-14 14:02:53,331 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:02:53,331 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:02:53,331 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-14 14:02:53,331 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-14 14:02:53,331 INFO L175 Difference]: Start difference. First operand has 537 places, 723 transitions, 11042 flow. Second operand 8 states and 198 transitions. [2024-06-14 14:02:53,331 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 762 transitions, 13002 flow [2024-06-14 14:03:02,741 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 762 transitions, 12626 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-06-14 14:03:02,750 INFO L231 Difference]: Finished difference. Result has 532 places, 723 transitions, 11057 flow [2024-06-14 14:03:02,750 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10666, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=190, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=533, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11057, PETRI_PLACES=532, PETRI_TRANSITIONS=723} [2024-06-14 14:03:02,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 490 predicate places. [2024-06-14 14:03:02,750 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 723 transitions, 11057 flow [2024-06-14 14:03:02,750 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:02,750 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:02,751 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:02,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-14 14:03:02,751 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)] === [2024-06-14 14:03:02,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:02,751 INFO L85 PathProgramCache]: Analyzing trace with hash 1241292608, now seen corresponding path program 14 times [2024-06-14 14:03:02,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:02,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [989340369] [2024-06-14 14:03:02,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:02,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:02,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:03,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:03,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:03,094 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [989340369] [2024-06-14 14:03:03,094 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [989340369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:03,094 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:03,094 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:03,094 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2146717550] [2024-06-14 14:03:03,094 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:03,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:03,095 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:03,095 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:03,095 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:03,138 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:03,138 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 723 transitions, 11057 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:03,138 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:03,138 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:03,138 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:04,557 INFO L124 PetriNetUnfolderBase]: 3473/5809 cut-off events. [2024-06-14 14:03:04,557 INFO L125 PetriNetUnfolderBase]: For 1408143/1408143 co-relation queries the response was YES. [2024-06-14 14:03:04,643 INFO L83 FinitePrefix]: Finished finitePrefix Result has 51275 conditions, 5809 events. 3473/5809 cut-off events. For 1408143/1408143 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 39195 event pairs, 592 based on Foata normal form. 10/5809 useless extension candidates. Maximal degree in co-relation 51035. Up to 4943 conditions per place. [2024-06-14 14:03:04,666 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 581 selfloop transitions, 167 changer transitions 0/754 dead transitions. [2024-06-14 14:03:04,666 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 754 transitions, 12657 flow [2024-06-14 14:03:04,667 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:03:04,667 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:03:04,667 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-14 14:03:04,667 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-14 14:03:04,667 INFO L175 Difference]: Start difference. First operand has 532 places, 723 transitions, 11057 flow. Second operand 8 states and 191 transitions. [2024-06-14 14:03:04,667 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 754 transitions, 12657 flow [2024-06-14 14:03:14,413 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 754 transitions, 12196 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-14 14:03:14,421 INFO L231 Difference]: Finished difference. Result has 531 places, 723 transitions, 10942 flow [2024-06-14 14:03:14,421 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10596, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=167, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=556, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10942, PETRI_PLACES=531, PETRI_TRANSITIONS=723} [2024-06-14 14:03:14,421 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-14 14:03:14,421 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 723 transitions, 10942 flow [2024-06-14 14:03:14,421 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:14,421 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:14,422 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:14,422 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-14 14:03:14,422 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)] === [2024-06-14 14:03:14,422 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:14,422 INFO L85 PathProgramCache]: Analyzing trace with hash -136238732, now seen corresponding path program 15 times [2024-06-14 14:03:14,422 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:14,422 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1509670657] [2024-06-14 14:03:14,422 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:14,422 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:14,429 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:14,762 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:14,762 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:14,762 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1509670657] [2024-06-14 14:03:14,763 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1509670657] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:14,763 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:14,763 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:14,763 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1999055543] [2024-06-14 14:03:14,763 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:14,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:14,763 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:14,763 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:14,763 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:14,807 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:14,808 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 723 transitions, 10942 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:14,808 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:14,808 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:14,808 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:16,221 INFO L124 PetriNetUnfolderBase]: 3450/5776 cut-off events. [2024-06-14 14:03:16,221 INFO L125 PetriNetUnfolderBase]: For 1275276/1275276 co-relation queries the response was YES. [2024-06-14 14:03:16,301 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49049 conditions, 5776 events. 3450/5776 cut-off events. For 1275276/1275276 co-relation queries the response was YES. Maximal size of possible extension queue 500. Compared 38988 event pairs, 583 based on Foata normal form. 10/5776 useless extension candidates. Maximal degree in co-relation 48810. Up to 4904 conditions per place. [2024-06-14 14:03:16,322 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 578 selfloop transitions, 172 changer transitions 0/756 dead transitions. [2024-06-14 14:03:16,323 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 756 transitions, 12550 flow [2024-06-14 14:03:16,323 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-14 14:03:16,323 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-14 14:03:16,323 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-14 14:03:16,323 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585365853658537 [2024-06-14 14:03:16,323 INFO L175 Difference]: Start difference. First operand has 531 places, 723 transitions, 10942 flow. Second operand 10 states and 229 transitions. [2024-06-14 14:03:16,323 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 756 transitions, 12550 flow [2024-06-14 14:03:24,910 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 756 transitions, 12182 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-14 14:03:24,919 INFO L231 Difference]: Finished difference. Result has 532 places, 723 transitions, 10933 flow [2024-06-14 14:03:24,919 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10574, PETRI_DIFFERENCE_MINUEND_PLACES=522, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=172, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=551, PETRI_DIFFERENCE_SUBTRAHEND_STATES=10, PETRI_FLOW=10933, PETRI_PLACES=532, PETRI_TRANSITIONS=723} [2024-06-14 14:03:24,919 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 490 predicate places. [2024-06-14 14:03:24,919 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 723 transitions, 10933 flow [2024-06-14 14:03:24,920 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:24,920 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:24,920 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:24,921 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-14 14:03:24,921 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)] === [2024-06-14 14:03:24,921 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:24,921 INFO L85 PathProgramCache]: Analyzing trace with hash -1592260634, now seen corresponding path program 16 times [2024-06-14 14:03:24,921 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:24,922 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [199432373] [2024-06-14 14:03:24,922 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:24,922 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:24,929 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:25,286 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:25,286 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:25,287 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [199432373] [2024-06-14 14:03:25,287 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [199432373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:25,288 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:25,288 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:25,288 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [146369980] [2024-06-14 14:03:25,288 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:25,288 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:25,288 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:25,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:25,289 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:25,332 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:25,333 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 723 transitions, 10933 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:25,333 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:25,333 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:25,333 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:26,828 INFO L124 PetriNetUnfolderBase]: 3577/5995 cut-off events. [2024-06-14 14:03:26,828 INFO L125 PetriNetUnfolderBase]: For 1610938/1610944 co-relation queries the response was YES. [2024-06-14 14:03:26,914 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49848 conditions, 5995 events. 3577/5995 cut-off events. For 1610938/1610944 co-relation queries the response was YES. Maximal size of possible extension queue 508. Compared 40617 event pairs, 508 based on Foata normal form. 48/6041 useless extension candidates. Maximal degree in co-relation 49610. Up to 4911 conditions per place. [2024-06-14 14:03:26,938 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 663 selfloop transitions, 90 changer transitions 1/760 dead transitions. [2024-06-14 14:03:26,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 760 transitions, 12622 flow [2024-06-14 14:03:26,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:03:26,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:03:26,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-14 14:03:26,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-14 14:03:26,940 INFO L175 Difference]: Start difference. First operand has 532 places, 723 transitions, 10933 flow. Second operand 7 states and 182 transitions. [2024-06-14 14:03:26,940 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 760 transitions, 12622 flow [2024-06-14 14:03:35,357 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 760 transitions, 12265 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-14 14:03:35,365 INFO L231 Difference]: Finished difference. Result has 528 places, 724 transitions, 10822 flow [2024-06-14 14:03:35,365 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10576, PETRI_DIFFERENCE_MINUEND_PLACES=521, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=723, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=88, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=633, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10822, PETRI_PLACES=528, PETRI_TRANSITIONS=724} [2024-06-14 14:03:35,365 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 486 predicate places. [2024-06-14 14:03:35,366 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 724 transitions, 10822 flow [2024-06-14 14:03:35,366 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:35,366 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:35,366 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:35,366 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-14 14:03:35,366 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)] === [2024-06-14 14:03:35,366 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:35,367 INFO L85 PathProgramCache]: Analyzing trace with hash 284223536, now seen corresponding path program 17 times [2024-06-14 14:03:35,367 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:35,367 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1443941712] [2024-06-14 14:03:35,367 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:35,367 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:35,375 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:35,689 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:35,690 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:35,690 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1443941712] [2024-06-14 14:03:35,690 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1443941712] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:35,690 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:35,690 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:35,690 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [195019429] [2024-06-14 14:03:35,690 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:35,690 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:35,690 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:35,690 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:35,690 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:35,732 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:35,732 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 528 places, 724 transitions, 10822 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:35,732 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:35,732 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:35,732 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:37,144 INFO L124 PetriNetUnfolderBase]: 3590/6013 cut-off events. [2024-06-14 14:03:37,144 INFO L125 PetriNetUnfolderBase]: For 1203678/1203684 co-relation queries the response was YES. [2024-06-14 14:03:37,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49719 conditions, 6013 events. 3590/6013 cut-off events. For 1203678/1203684 co-relation queries the response was YES. Maximal size of possible extension queue 511. Compared 40757 event pairs, 608 based on Foata normal form. 14/6020 useless extension candidates. Maximal degree in co-relation 49482. Up to 5155 conditions per place. [2024-06-14 14:03:37,255 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 614 selfloop transitions, 142 changer transitions 0/762 dead transitions. [2024-06-14 14:03:37,255 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 762 transitions, 12490 flow [2024-06-14 14:03:37,256 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:03:37,256 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:03:37,256 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-14 14:03:37,257 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-14 14:03:37,257 INFO L175 Difference]: Start difference. First operand has 528 places, 724 transitions, 10822 flow. Second operand 8 states and 201 transitions. [2024-06-14 14:03:37,257 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 762 transitions, 12490 flow [2024-06-14 14:03:46,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 762 transitions, 12289 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-14 14:03:46,625 INFO L231 Difference]: Finished difference. Result has 531 places, 725 transitions, 10954 flow [2024-06-14 14:03:46,626 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10621, PETRI_DIFFERENCE_MINUEND_PLACES=523, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=724, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=141, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=582, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10954, PETRI_PLACES=531, PETRI_TRANSITIONS=725} [2024-06-14 14:03:46,626 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-14 14:03:46,626 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 725 transitions, 10954 flow [2024-06-14 14:03:46,626 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:46,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:46,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:46,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-14 14:03:46,626 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)] === [2024-06-14 14:03:46,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:46,626 INFO L85 PathProgramCache]: Analyzing trace with hash 399514706, now seen corresponding path program 18 times [2024-06-14 14:03:46,627 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:46,627 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1959913794] [2024-06-14 14:03:46,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:46,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:46,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:46,964 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:46,964 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:46,964 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1959913794] [2024-06-14 14:03:46,964 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1959913794] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:46,964 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:46,964 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:46,964 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1320957806] [2024-06-14 14:03:46,964 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:46,964 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:46,964 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:46,965 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:46,965 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:47,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:47,039 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 531 places, 725 transitions, 10954 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:47,039 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:47,039 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:47,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:03:48,519 INFO L124 PetriNetUnfolderBase]: 3613/6050 cut-off events. [2024-06-14 14:03:48,519 INFO L125 PetriNetUnfolderBase]: For 1199072/1199078 co-relation queries the response was YES. [2024-06-14 14:03:48,604 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49800 conditions, 6050 events. 3613/6050 cut-off events. For 1199072/1199078 co-relation queries the response was YES. Maximal size of possible extension queue 514. Compared 41035 event pairs, 611 based on Foata normal form. 14/6057 useless extension candidates. Maximal degree in co-relation 49563. Up to 5333 conditions per place. [2024-06-14 14:03:48,628 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 677 selfloop transitions, 77 changer transitions 0/760 dead transitions. [2024-06-14 14:03:48,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 760 transitions, 12612 flow [2024-06-14 14:03:48,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:03:48,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:03:48,628 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-14 14:03:48,628 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-14 14:03:48,629 INFO L175 Difference]: Start difference. First operand has 531 places, 725 transitions, 10954 flow. Second operand 8 states and 195 transitions. [2024-06-14 14:03:48,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 760 transitions, 12612 flow [2024-06-14 14:03:58,280 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 760 transitions, 12284 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-14 14:03:58,289 INFO L231 Difference]: Finished difference. Result has 532 places, 726 transitions, 10831 flow [2024-06-14 14:03:58,289 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10626, PETRI_DIFFERENCE_MINUEND_PLACES=524, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=725, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=76, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=648, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=10831, PETRI_PLACES=532, PETRI_TRANSITIONS=726} [2024-06-14 14:03:58,289 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 490 predicate places. [2024-06-14 14:03:58,289 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 726 transitions, 10831 flow [2024-06-14 14:03:58,289 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:58,289 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:03:58,289 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:03:58,289 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-14 14:03:58,289 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)] === [2024-06-14 14:03:58,290 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:03:58,290 INFO L85 PathProgramCache]: Analyzing trace with hash 492333224, now seen corresponding path program 19 times [2024-06-14 14:03:58,290 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:03:58,290 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336057323] [2024-06-14 14:03:58,290 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:03:58,290 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:03:58,296 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:03:58,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:03:58,610 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:03:58,610 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336057323] [2024-06-14 14:03:58,610 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336057323] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:03:58,610 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:03:58,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:03:58,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1470995927] [2024-06-14 14:03:58,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:03:58,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:03:58,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:03:58,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:03:58,611 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:03:58,665 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:03:58,666 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 532 places, 726 transitions, 10831 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:03:58,666 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:03:58,666 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:03:58,666 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:00,100 INFO L124 PetriNetUnfolderBase]: 3636/6092 cut-off events. [2024-06-14 14:04:00,100 INFO L125 PetriNetUnfolderBase]: For 1174025/1174031 co-relation queries the response was YES. [2024-06-14 14:04:00,188 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49576 conditions, 6092 events. 3636/6092 cut-off events. For 1174025/1174031 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 41384 event pairs, 480 based on Foata normal form. 14/6104 useless extension candidates. Maximal degree in co-relation 49339. Up to 4730 conditions per place. [2024-06-14 14:04:00,210 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 605 selfloop transitions, 159 changer transitions 0/770 dead transitions. [2024-06-14 14:04:00,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 770 transitions, 12571 flow [2024-06-14 14:04:00,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-14 14:04:00,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-14 14:04:00,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-14 14:04:00,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-14 14:04:00,211 INFO L175 Difference]: Start difference. First operand has 532 places, 726 transitions, 10831 flow. Second operand 8 states and 206 transitions. [2024-06-14 14:04:00,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 770 transitions, 12571 flow [2024-06-14 14:04:08,284 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 770 transitions, 12388 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:08,294 INFO L231 Difference]: Finished difference. Result has 535 places, 727 transitions, 11018 flow [2024-06-14 14:04:08,295 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10648, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=726, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=158, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=567, PETRI_DIFFERENCE_SUBTRAHEND_STATES=8, PETRI_FLOW=11018, PETRI_PLACES=535, PETRI_TRANSITIONS=727} [2024-06-14 14:04:08,295 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-14 14:04:08,295 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 727 transitions, 11018 flow [2024-06-14 14:04:08,295 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:08,296 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:08,296 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] [2024-06-14 14:04:08,296 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-14 14:04:08,296 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)] === [2024-06-14 14:04:08,296 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:08,296 INFO L85 PathProgramCache]: Analyzing trace with hash -136054034, now seen corresponding path program 3 times [2024-06-14 14:04:08,296 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:08,297 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [312704951] [2024-06-14 14:04:08,297 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:08,297 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:08,305 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:08,658 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:08,658 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:08,658 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [312704951] [2024-06-14 14:04:08,658 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [312704951] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:08,658 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:08,658 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-14 14:04:08,658 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [263336366] [2024-06-14 14:04:08,658 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:08,658 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-14 14:04:08,658 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:08,658 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-14 14:04:08,659 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-14 14:04:08,710 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:08,710 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 535 places, 727 transitions, 11018 flow. Second operand has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:08,710 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:08,710 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:08,711 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:10,142 INFO L124 PetriNetUnfolderBase]: 3631/6080 cut-off events. [2024-06-14 14:04:10,142 INFO L125 PetriNetUnfolderBase]: For 1082795/1082795 co-relation queries the response was YES. [2024-06-14 14:04:10,230 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49541 conditions, 6080 events. 3631/6080 cut-off events. For 1082795/1082795 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 41360 event pairs, 647 based on Foata normal form. 2/6074 useless extension candidates. Maximal degree in co-relation 49303. Up to 5410 conditions per place. [2024-06-14 14:04:10,254 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 668 selfloop transitions, 71 changer transitions 0/745 dead transitions. [2024-06-14 14:04:10,254 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 745 transitions, 12540 flow [2024-06-14 14:04:10,255 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-14 14:04:10,255 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-14 14:04:10,255 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-14 14:04:10,255 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-14 14:04:10,255 INFO L175 Difference]: Start difference. First operand has 535 places, 727 transitions, 11018 flow. Second operand 7 states and 157 transitions. [2024-06-14 14:04:10,255 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 745 transitions, 12540 flow [2024-06-14 14:04:18,238 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 745 transitions, 12178 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-14 14:04:18,246 INFO L231 Difference]: Finished difference. Result has 534 places, 727 transitions, 10809 flow [2024-06-14 14:04:18,247 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10656, PETRI_DIFFERENCE_MINUEND_PLACES=527, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=71, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=656, PETRI_DIFFERENCE_SUBTRAHEND_STATES=7, PETRI_FLOW=10809, PETRI_PLACES=534, PETRI_TRANSITIONS=727} [2024-06-14 14:04:18,247 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 492 predicate places. [2024-06-14 14:04:18,247 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 727 transitions, 10809 flow [2024-06-14 14:04:18,247 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 8 states, 8 states have (on average 15.125) internal successors, (121), 8 states have internal predecessors, (121), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:18,247 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:18,247 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:18,247 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-14 14:04:18,247 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)] === [2024-06-14 14:04:18,247 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:18,247 INFO L85 PathProgramCache]: Analyzing trace with hash 1241297723, now seen corresponding path program 31 times [2024-06-14 14:04:18,248 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:18,248 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2143531467] [2024-06-14 14:04:18,248 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:18,248 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:18,256 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:18,601 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:18,601 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:18,601 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2143531467] [2024-06-14 14:04:18,601 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2143531467] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:18,601 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:18,602 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:18,602 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [677524117] [2024-06-14 14:04:18,602 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:18,602 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:18,602 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:18,602 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:18,602 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:18,664 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:18,664 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 534 places, 727 transitions, 10809 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:18,664 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:18,664 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:18,664 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:20,122 INFO L124 PetriNetUnfolderBase]: 3628/6069 cut-off events. [2024-06-14 14:04:20,123 INFO L125 PetriNetUnfolderBase]: For 1042912/1042912 co-relation queries the response was YES. [2024-06-14 14:04:20,213 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48684 conditions, 6069 events. 3628/6069 cut-off events. For 1042912/1042912 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 41230 event pairs, 669 based on Foata normal form. 1/6062 useless extension candidates. Maximal degree in co-relation 48447. Up to 4909 conditions per place. [2024-06-14 14:04:20,239 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 357 selfloop transitions, 395 changer transitions 0/758 dead transitions. [2024-06-14 14:04:20,239 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 758 transitions, 13277 flow [2024-06-14 14:04:20,240 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:04:20,240 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:04:20,240 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-14 14:04:20,240 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-14 14:04:20,240 INFO L175 Difference]: Start difference. First operand has 534 places, 727 transitions, 10809 flow. Second operand 9 states and 213 transitions. [2024-06-14 14:04:20,240 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 758 transitions, 13277 flow [2024-06-14 14:04:28,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 758 transitions, 13118 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-14 14:04:28,844 INFO L231 Difference]: Finished difference. Result has 538 places, 727 transitions, 11462 flow [2024-06-14 14:04:28,844 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10662, PETRI_DIFFERENCE_MINUEND_PLACES=529, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=395, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=332, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11462, PETRI_PLACES=538, PETRI_TRANSITIONS=727} [2024-06-14 14:04:28,844 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 496 predicate places. [2024-06-14 14:04:28,844 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 727 transitions, 11462 flow [2024-06-14 14:04:28,844 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:28,844 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:28,844 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:28,845 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-14 14:04:28,845 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)] === [2024-06-14 14:04:28,845 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:28,845 INFO L85 PathProgramCache]: Analyzing trace with hash -423115367, now seen corresponding path program 32 times [2024-06-14 14:04:28,845 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:28,845 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207882898] [2024-06-14 14:04:28,845 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:28,845 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:28,853 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:29,190 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:29,191 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:29,191 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207882898] [2024-06-14 14:04:29,191 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207882898] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:29,191 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:29,191 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:29,191 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1519999879] [2024-06-14 14:04:29,191 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:29,191 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:29,191 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:29,191 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:29,191 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:29,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:29,247 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 538 places, 727 transitions, 11462 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:29,247 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:29,247 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:29,247 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:30,754 INFO L124 PetriNetUnfolderBase]: 3625/6065 cut-off events. [2024-06-14 14:04:30,754 INFO L125 PetriNetUnfolderBase]: For 1022044/1022044 co-relation queries the response was YES. [2024-06-14 14:04:30,843 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49201 conditions, 6065 events. 3625/6065 cut-off events. For 1022044/1022044 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 41185 event pairs, 669 based on Foata normal form. 1/6058 useless extension candidates. Maximal degree in co-relation 48963. Up to 4906 conditions per place. [2024-06-14 14:04:30,868 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 355 selfloop transitions, 396 changer transitions 0/757 dead transitions. [2024-06-14 14:04:30,868 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 757 transitions, 13626 flow [2024-06-14 14:04:30,868 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-14 14:04:30,869 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-14 14:04:30,869 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-14 14:04:30,869 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-14 14:04:30,869 INFO L175 Difference]: Start difference. First operand has 538 places, 727 transitions, 11462 flow. Second operand 9 states and 212 transitions. [2024-06-14 14:04:30,869 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 757 transitions, 13626 flow [2024-06-14 14:04:39,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 757 transitions, 12972 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-14 14:04:39,869 INFO L231 Difference]: Finished difference. Result has 541 places, 727 transitions, 11614 flow [2024-06-14 14:04:39,869 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10812, PETRI_DIFFERENCE_MINUEND_PLACES=532, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=396, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=331, PETRI_DIFFERENCE_SUBTRAHEND_STATES=9, PETRI_FLOW=11614, PETRI_PLACES=541, PETRI_TRANSITIONS=727} [2024-06-14 14:04:39,869 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 499 predicate places. [2024-06-14 14:04:39,869 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 727 transitions, 11614 flow [2024-06-14 14:04:39,870 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:39,870 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:39,870 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:39,870 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-14 14:04:39,870 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)] === [2024-06-14 14:04:39,870 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:39,870 INFO L85 PathProgramCache]: Analyzing trace with hash 1528190633, now seen corresponding path program 33 times [2024-06-14 14:04:39,870 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:39,870 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [755919841] [2024-06-14 14:04:39,870 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:39,870 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:39,879 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:40,237 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:40,237 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:40,237 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [755919841] [2024-06-14 14:04:40,237 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [755919841] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:40,237 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:40,237 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:40,238 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [647529277] [2024-06-14 14:04:40,238 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:40,238 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:40,238 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:40,238 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:40,239 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:40,307 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:40,307 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 541 places, 727 transitions, 11614 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:40,308 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:40,308 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:40,308 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:41,869 INFO L124 PetriNetUnfolderBase]: 3622/6061 cut-off events. [2024-06-14 14:04:41,870 INFO L125 PetriNetUnfolderBase]: For 1012646/1012646 co-relation queries the response was YES. [2024-06-14 14:04:41,959 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49125 conditions, 6061 events. 3622/6061 cut-off events. For 1012646/1012646 co-relation queries the response was YES. Maximal size of possible extension queue 516. Compared 41165 event pairs, 669 based on Foata normal form. 1/6054 useless extension candidates. Maximal degree in co-relation 48886. Up to 4903 conditions per place. [2024-06-14 14:04:41,984 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 353 selfloop transitions, 400 changer transitions 0/759 dead transitions. [2024-06-14 14:04:41,984 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 759 transitions, 13786 flow [2024-06-14 14:04:41,984 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-14 14:04:41,984 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-14 14:04:41,985 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-14 14:04:41,985 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-14 14:04:41,985 INFO L175 Difference]: Start difference. First operand has 541 places, 727 transitions, 11614 flow. Second operand 11 states and 253 transitions. [2024-06-14 14:04:41,985 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 759 transitions, 13786 flow [2024-06-14 14:04:51,159 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 759 transitions, 12952 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-14 14:04:51,168 INFO L231 Difference]: Finished difference. Result has 542 places, 727 transitions, 11598 flow [2024-06-14 14:04:51,168 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10784, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=400, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=327, PETRI_DIFFERENCE_SUBTRAHEND_STATES=11, PETRI_FLOW=11598, PETRI_PLACES=542, PETRI_TRANSITIONS=727} [2024-06-14 14:04:51,168 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 500 predicate places. [2024-06-14 14:04:51,169 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 727 transitions, 11598 flow [2024-06-14 14:04:51,169 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:51,169 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:04:51,169 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:04:51,169 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-14 14:04:51,169 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)] === [2024-06-14 14:04:51,169 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:04:51,169 INFO L85 PathProgramCache]: Analyzing trace with hash 1528185053, now seen corresponding path program 34 times [2024-06-14 14:04:51,169 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:04:51,169 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1550422713] [2024-06-14 14:04:51,169 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:04:51,169 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:04:51,176 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:04:51,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:04:51,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:04:51,499 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1550422713] [2024-06-14 14:04:51,499 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1550422713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:04:51,499 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:04:51,499 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:04:51,499 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2101842869] [2024-06-14 14:04:51,499 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:04:51,499 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:04:51,499 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:04:51,500 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:04:51,500 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:04:51,568 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:04:51,568 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 542 places, 727 transitions, 11598 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:04:51,568 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:04:51,568 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:04:51,568 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:04:53,122 INFO L124 PetriNetUnfolderBase]: 3619/6064 cut-off events. [2024-06-14 14:04:53,122 INFO L125 PetriNetUnfolderBase]: For 1001510/1001510 co-relation queries the response was YES. [2024-06-14 14:04:53,209 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48958 conditions, 6064 events. 3619/6064 cut-off events. For 1001510/1001510 co-relation queries the response was YES. Maximal size of possible extension queue 520. Compared 41304 event pairs, 659 based on Foata normal form. 1/6057 useless extension candidates. Maximal degree in co-relation 48719. Up to 4900 conditions per place. [2024-06-14 14:04:53,233 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 359 selfloop transitions, 399 changer transitions 0/764 dead transitions. [2024-06-14 14:04:53,233 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 764 transitions, 14378 flow [2024-06-14 14:04:53,234 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-14 14:04:53,234 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-14 14:04:53,234 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 308 transitions. [2024-06-14 14:04:53,234 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-14 14:04:53,234 INFO L175 Difference]: Start difference. First operand has 542 places, 727 transitions, 11598 flow. Second operand 14 states and 308 transitions. [2024-06-14 14:04:53,234 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 764 transitions, 14378 flow [2024-06-14 14:05:02,465 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 764 transitions, 13722 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-14 14:05:02,473 INFO L231 Difference]: Finished difference. Result has 545 places, 727 transitions, 11770 flow [2024-06-14 14:05:02,474 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10958, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=14, PETRI_FLOW=11770, PETRI_PLACES=545, PETRI_TRANSITIONS=727} [2024-06-14 14:05:02,474 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 503 predicate places. [2024-06-14 14:05:02,474 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 727 transitions, 11770 flow [2024-06-14 14:05:02,474 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:02,474 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:02,474 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:02,474 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-14 14:05:02,474 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)] === [2024-06-14 14:05:02,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:02,475 INFO L85 PathProgramCache]: Analyzing trace with hash -136060637, now seen corresponding path program 35 times [2024-06-14 14:05:02,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:02,475 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1906494304] [2024-06-14 14:05:02,475 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:02,475 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:02,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:02,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:02,833 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:02,833 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1906494304] [2024-06-14 14:05:02,833 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1906494304] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:02,833 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:02,833 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:02,833 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [295579667] [2024-06-14 14:05:02,833 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:02,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:02,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:02,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:02,834 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:02,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:02,898 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 545 places, 727 transitions, 11770 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:02,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:02,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:02,898 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:04,466 INFO L124 PetriNetUnfolderBase]: 3624/6073 cut-off events. [2024-06-14 14:05:04,466 INFO L125 PetriNetUnfolderBase]: For 990726/990726 co-relation queries the response was YES. [2024-06-14 14:05:04,551 INFO L83 FinitePrefix]: Finished finitePrefix Result has 49029 conditions, 6073 events. 3624/6073 cut-off events. For 990726/990726 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 41369 event pairs, 659 based on Foata normal form. 1/6066 useless extension candidates. Maximal degree in co-relation 48791. Up to 4906 conditions per place. [2024-06-14 14:05:04,574 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 357 selfloop transitions, 402 changer transitions 0/765 dead transitions. [2024-06-14 14:05:04,574 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 765 transitions, 14603 flow [2024-06-14 14:05:04,575 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-14 14:05:04,575 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-14 14:05:04,575 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 270 transitions. [2024-06-14 14:05:04,575 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-14 14:05:04,575 INFO L175 Difference]: Start difference. First operand has 545 places, 727 transitions, 11770 flow. Second operand 12 states and 270 transitions. [2024-06-14 14:05:04,575 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 765 transitions, 14603 flow [2024-06-14 14:05:12,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 765 transitions, 13488 flow, removed 19 selfloop flow, removed 14 redundant places. [2024-06-14 14:05:12,589 INFO L231 Difference]: Finished difference. Result has 543 places, 730 transitions, 11552 flow [2024-06-14 14:05:12,590 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10683, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=727, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=399, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=328, PETRI_DIFFERENCE_SUBTRAHEND_STATES=12, PETRI_FLOW=11552, PETRI_PLACES=543, PETRI_TRANSITIONS=730} [2024-06-14 14:05:12,590 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 501 predicate places. [2024-06-14 14:05:12,590 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 730 transitions, 11552 flow [2024-06-14 14:05:12,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:12,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:12,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:12,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-14 14:05:12,590 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)] === [2024-06-14 14:05:12,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:12,591 INFO L85 PathProgramCache]: Analyzing trace with hash 1528369193, now seen corresponding path program 36 times [2024-06-14 14:05:12,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:12,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [162344235] [2024-06-14 14:05:12,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:12,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:12,597 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:12,921 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:12,921 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:12,921 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [162344235] [2024-06-14 14:05:12,921 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [162344235] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:12,921 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:12,922 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:12,922 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [708020428] [2024-06-14 14:05:12,922 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:12,922 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:12,922 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:12,922 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:12,923 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:12,997 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:13,000 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 543 places, 730 transitions, 11552 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:13,000 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:13,000 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:13,000 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:14,529 INFO L124 PetriNetUnfolderBase]: 3621/6069 cut-off events. [2024-06-14 14:05:14,529 INFO L125 PetriNetUnfolderBase]: For 965161/965161 co-relation queries the response was YES. [2024-06-14 14:05:14,611 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48622 conditions, 6069 events. 3621/6069 cut-off events. For 965161/965161 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 41299 event pairs, 659 based on Foata normal form. 1/6062 useless extension candidates. Maximal degree in co-relation 48385. Up to 4903 conditions per place. [2024-06-14 14:05:14,631 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 349 selfloop transitions, 410 changer transitions 0/765 dead transitions. [2024-06-14 14:05:14,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 765 transitions, 14024 flow [2024-06-14 14:05:14,632 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:05:14,632 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:05:14,632 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 285 transitions. [2024-06-14 14:05:14,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347091932457786 [2024-06-14 14:05:14,633 INFO L175 Difference]: Start difference. First operand has 543 places, 730 transitions, 11552 flow. Second operand 13 states and 285 transitions. [2024-06-14 14:05:14,633 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 765 transitions, 14024 flow [2024-06-14 14:05:21,975 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 765 transitions, 13184 flow, removed 17 selfloop flow, removed 12 redundant places. [2024-06-14 14:05:21,984 INFO L231 Difference]: Finished difference. Result has 544 places, 730 transitions, 11558 flow [2024-06-14 14:05:21,984 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10724, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=13, PETRI_FLOW=11558, PETRI_PLACES=544, PETRI_TRANSITIONS=730} [2024-06-14 14:05:21,984 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 502 predicate places. [2024-06-14 14:05:21,984 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 730 transitions, 11558 flow [2024-06-14 14:05:21,984 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:21,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:21,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:21,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-14 14:05:21,985 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)] === [2024-06-14 14:05:21,985 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:21,985 INFO L85 PathProgramCache]: Analyzing trace with hash -135882077, now seen corresponding path program 37 times [2024-06-14 14:05:21,985 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:21,985 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [561805574] [2024-06-14 14:05:21,985 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:21,985 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:21,991 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:22,316 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:22,316 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:22,316 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [561805574] [2024-06-14 14:05:22,316 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [561805574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:22,316 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:22,316 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:22,316 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1558768751] [2024-06-14 14:05:22,316 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:22,316 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:22,317 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:22,317 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:22,317 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:22,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:22,367 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 544 places, 730 transitions, 11558 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:22,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:22,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:22,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:23,909 INFO L124 PetriNetUnfolderBase]: 3618/6062 cut-off events. [2024-06-14 14:05:23,910 INFO L125 PetriNetUnfolderBase]: For 941953/941953 co-relation queries the response was YES. [2024-06-14 14:05:23,991 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48372 conditions, 6062 events. 3618/6062 cut-off events. For 941953/941953 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 41228 event pairs, 665 based on Foata normal form. 1/6055 useless extension candidates. Maximal degree in co-relation 48136. Up to 4900 conditions per place. [2024-06-14 14:05:24,012 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 351 selfloop transitions, 410 changer transitions 0/767 dead transitions. [2024-06-14 14:05:24,012 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 767 transitions, 14032 flow [2024-06-14 14:05:24,013 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-14 14:05:24,013 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-14 14:05:24,013 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 321 transitions. [2024-06-14 14:05:24,013 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-14 14:05:24,013 INFO L175 Difference]: Start difference. First operand has 544 places, 730 transitions, 11558 flow. Second operand 15 states and 321 transitions. [2024-06-14 14:05:24,013 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 767 transitions, 14032 flow [2024-06-14 14:05:32,839 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 767 transitions, 13031 flow, removed 21 selfloop flow, removed 13 redundant places. [2024-06-14 14:05:32,848 INFO L231 Difference]: Finished difference. Result has 546 places, 730 transitions, 11407 flow [2024-06-14 14:05:32,848 INFO L264 CegarLoopForPetriNet]: {PETRI_ALPHABET=41, PETRI_DIFFERENCE_MINUEND_FLOW=10569, PETRI_DIFFERENCE_MINUEND_PLACES=531, PETRI_DIFFERENCE_MINUEND_TRANSITIONS=730, PETRI_DIFFERENCE_SUBTRAHEND_LETTERS_WITH_MORE_CHANGERS_THAN_LOOPERS=410, PETRI_DIFFERENCE_SUBTRAHEND_LOOPER_ONLY_LETTERS=320, PETRI_DIFFERENCE_SUBTRAHEND_STATES=15, PETRI_FLOW=11407, PETRI_PLACES=546, PETRI_TRANSITIONS=730} [2024-06-14 14:05:32,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 504 predicate places. [2024-06-14 14:05:32,848 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 730 transitions, 11407 flow [2024-06-14 14:05:32,848 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:32,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-14 14:05:32,849 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-14 14:05:32,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-14 14:05:32,849 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)] === [2024-06-14 14:05:32,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-14 14:05:32,849 INFO L85 PathProgramCache]: Analyzing trace with hash -135876497, now seen corresponding path program 38 times [2024-06-14 14:05:32,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-14 14:05:32,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1280526422] [2024-06-14 14:05:32,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-14 14:05:32,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-14 14:05:32,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-14 14:05:33,185 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-14 14:05:33,185 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-14 14:05:33,185 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1280526422] [2024-06-14 14:05:33,186 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1280526422] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-14 14:05:33,186 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-14 14:05:33,186 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-14 14:05:33,186 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1521593819] [2024-06-14 14:05:33,186 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-14 14:05:33,186 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-14 14:05:33,186 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-14 14:05:33,186 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-14 14:05:33,186 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-14 14:05:33,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-14 14:05:33,241 INFO L103 encePairwiseOnDemand]: Start differencePairwiseOnDemand. First operand has 546 places, 730 transitions, 11407 flow. Second operand has 9 states, 9 states have (on average 15.0) internal successors, (135), 9 states have internal predecessors, (135), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-14 14:05:33,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-14 14:05:33,241 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-14 14:05:33,241 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-14 14:05:34,832 INFO L124 PetriNetUnfolderBase]: 3615/6058 cut-off events. [2024-06-14 14:05:34,832 INFO L125 PetriNetUnfolderBase]: For 917568/917568 co-relation queries the response was YES. [2024-06-14 14:05:34,915 INFO L83 FinitePrefix]: Finished finitePrefix Result has 48082 conditions, 6058 events. 3615/6058 cut-off events. For 917568/917568 co-relation queries the response was YES. Maximal size of possible extension queue 522. Compared 41293 event pairs, 665 based on Foata normal form. 1/6051 useless extension candidates. Maximal degree in co-relation 47848. Up to 4897 conditions per place. [2024-06-14 14:05:34,937 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 348 selfloop transitions, 410 changer transitions 0/764 dead transitions. [2024-06-14 14:05:34,937 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 764 transitions, 13577 flow [2024-06-14 14:05:34,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-14 14:05:34,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-14 14:05:34,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 284 transitions. [2024-06-14 14:05:34,938 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328330206378987 [2024-06-14 14:05:34,938 INFO L175 Difference]: Start difference. First operand has 546 places, 730 transitions, 11407 flow. Second operand 13 states and 284 transitions. [2024-06-14 14:05:34,938 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 764 transitions, 13577 flow Killed by 15