./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 bcb38a6f Calling Ultimate with: /root/.sdkman/candidates/java/current/bin/java -Dosgi.configuration.area=/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/config -Xmx15G -Xms4m -jar /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/org.eclipse.equinox.launcher_1.5.800.v20200727-1323.jar -data @noDefault -ultimatedata /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data -tc /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/AutomizerReachWitnessValidation.xml -i ../../../trunk/examples/svcomp/pthread-wmm/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-bcb38a6-m [2024-06-03 20:33:16,506 INFO L188 SettingsManager]: Resetting all preferences to default values... [2024-06-03 20:33:16,556 INFO L114 SettingsManager]: Loading settings from /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/config/svcomp-Reach-32bit-Automizer_Default.epf [2024-06-03 20:33:16,559 WARN L101 SettingsManager]: Preference file contains the following unknown settings: [2024-06-03 20:33:16,559 WARN L103 SettingsManager]: * de.uni_freiburg.informatik.ultimate.core.Log level for class [2024-06-03 20:33:16,573 INFO L130 SettingsManager]: Preferences different from defaults after loading the file: [2024-06-03 20:33:16,573 INFO L151 SettingsManager]: Preferences of UltimateCore differ from their defaults: [2024-06-03 20:33:16,574 INFO L153 SettingsManager]: * Log level for class=de.uni_freiburg.informatik.ultimate.lib.smtlibutils.quantifier.QuantifierPusher=ERROR; [2024-06-03 20:33:16,574 INFO L151 SettingsManager]: Preferences of Boogie Preprocessor differ from their defaults: [2024-06-03 20:33:16,574 INFO L153 SettingsManager]: * Use memory slicer=true [2024-06-03 20:33:16,575 INFO L151 SettingsManager]: Preferences of Boogie Procedure Inliner differ from their defaults: [2024-06-03 20:33:16,575 INFO L153 SettingsManager]: * Ignore calls to procedures called more than once=ONLY_FOR_SEQUENTIAL_PROGRAMS [2024-06-03 20:33:16,575 INFO L151 SettingsManager]: Preferences of BlockEncodingV2 differ from their defaults: [2024-06-03 20:33:16,576 INFO L153 SettingsManager]: * Create parallel compositions if possible=false [2024-06-03 20:33:16,576 INFO L153 SettingsManager]: * Use SBE=true [2024-06-03 20:33:16,576 INFO L151 SettingsManager]: Preferences of CACSL2BoogieTranslator differ from their defaults: [2024-06-03 20:33:16,577 INFO L153 SettingsManager]: * Pointer base address is valid at dereference=IGNORE [2024-06-03 20:33:16,577 INFO L153 SettingsManager]: * sizeof long=4 [2024-06-03 20:33:16,577 INFO L153 SettingsManager]: * Overapproximate operations on floating types=true [2024-06-03 20:33:16,577 INFO L153 SettingsManager]: * sizeof POINTER=4 [2024-06-03 20:33:16,578 INFO L153 SettingsManager]: * Check division by zero=IGNORE [2024-06-03 20:33:16,586 INFO L153 SettingsManager]: * Pointer to allocated memory at dereference=IGNORE [2024-06-03 20:33:16,586 INFO L153 SettingsManager]: * If two pointers are subtracted or compared they have the same base address=IGNORE [2024-06-03 20:33:16,586 INFO L153 SettingsManager]: * Check array bounds for arrays that are off heap=IGNORE [2024-06-03 20:33:16,586 INFO L153 SettingsManager]: * Allow undefined functions=false [2024-06-03 20:33:16,586 INFO L153 SettingsManager]: * sizeof long double=12 [2024-06-03 20:33:16,587 INFO L153 SettingsManager]: * Check if freed pointer was valid=false [2024-06-03 20:33:16,587 INFO L153 SettingsManager]: * Use constant arrays=true [2024-06-03 20:33:16,587 INFO L151 SettingsManager]: Preferences of RCFGBuilder differ from their defaults: [2024-06-03 20:33:16,588 INFO L153 SettingsManager]: * Size of a code block=SequenceOfStatements [2024-06-03 20:33:16,588 INFO L153 SettingsManager]: * Only consider context switches at boundaries of atomic blocks=true [2024-06-03 20:33:16,589 INFO L153 SettingsManager]: * SMT solver=External_DefaultMode [2024-06-03 20:33:16,589 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:33:16,589 INFO L151 SettingsManager]: Preferences of TraceAbstraction differ from their defaults: [2024-06-03 20:33:16,589 INFO L153 SettingsManager]: * Compute Interpolants along a Counterexample=FPandBP [2024-06-03 20:33:16,589 INFO L153 SettingsManager]: * Positions where we compute the Hoare Annotation=LoopHeads [2024-06-03 20:33:16,590 INFO L153 SettingsManager]: * Trace refinement strategy=CAMEL [2024-06-03 20:33:16,590 INFO L153 SettingsManager]: * Command for external solver=z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in [2024-06-03 20:33:16,590 INFO L153 SettingsManager]: * Apply one-shot large block encoding in concurrent analysis=false [2024-06-03 20:33:16,590 INFO L153 SettingsManager]: * Automaton type used in concurrency analysis=PETRI_NET [2024-06-03 20:33:16,590 INFO L153 SettingsManager]: * Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG=true [2024-06-03 20:33:16,591 INFO L153 SettingsManager]: * Order on configurations for Petri net unfoldings=DBO [2024-06-03 20:33:16,591 INFO L153 SettingsManager]: * SMT solver=External_ModelsAndUnsatCoreMode [2024-06-03 20:33:16,591 INFO L153 SettingsManager]: * Looper check in Petri net analysis=SEMANTIC WARNING: An illegal reflective access operation has occurred WARNING: Illegal reflective access by com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 (file:/storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/plugins/com.sun.xml.bind_2.2.0.v201505121915.jar) to method java.lang.ClassLoader.defineClass(java.lang.String,byte[],int,int) WARNING: Please consider reporting this to the maintainers of com.sun.xml.bind.v2.runtime.reflect.opt.Injector$1 WARNING: Use --illegal-access=warn to enable warnings of further illegal reflective access operations WARNING: All illegal access operations will be denied in a future release Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Entry function -> main Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction: Compute Hoare Annotation of negated interpolant automaton, abstraction and CFG -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.witnessparser: Only consider loop invariants -> false Applying setting for plugin de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator: Check unreachability of reach_error function -> false [2024-06-03 20:33:16,810 INFO L75 nceAwareModelManager]: Repository-Root is: /tmp [2024-06-03 20:33:16,824 INFO L261 ainManager$Toolchain]: [Toolchain 1]: Applicable parser(s) successfully (re)initialized [2024-06-03 20:33:16,827 INFO L217 ainManager$Toolchain]: [Toolchain 1]: Toolchain selected. [2024-06-03 20:33:16,828 INFO L270 PluginConnector]: Initializing Witness Parser... [2024-06-03 20:33:16,829 INFO L274 PluginConnector]: Witness Parser initialized [2024-06-03 20:33:16,829 INFO L431 ainManager$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 [2024-06-03 20:33:16,973 INFO L270 PluginConnector]: Initializing CDTParser... [2024-06-03 20:33:16,974 INFO L274 PluginConnector]: CDTParser initialized [2024-06-03 20:33:16,974 INFO L431 ainManager$Toolchain]: [Toolchain 1]: Parsing single file: /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/../../../trunk/examples/svcomp/pthread-wmm/safe003_tso.i [2024-06-03 20:33:18,045 INFO L533 CDTParser]: Created temporary CDT project at NULL [2024-06-03 20:33:18,262 INFO L384 CDTParser]: Found 1 translation units. [2024-06-03 20:33:18,274 INFO L180 CDTParser]: Scanning /storage/repos/ultimate/trunk/examples/svcomp/pthread-wmm/safe003_tso.i [2024-06-03 20:33:18,285 INFO L427 CDTParser]: About to delete temporary CDT project at /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ac48d7ab/5c85828553744e31bb1e031fc76ef9ae/FLAG772f68df7 [2024-06-03 20:33:18,294 INFO L435 CDTParser]: Successfully deleted /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/data/2ac48d7ab/5c85828553744e31bb1e031fc76ef9ae [2024-06-03 20:33:18,294 INFO L299 ainManager$Toolchain]: ####################### [Toolchain 1] ####################### [2024-06-03 20:33:18,295 INFO L133 ToolchainWalker]: Walking toolchain with 5 elements. [2024-06-03 20:33:18,296 INFO L112 PluginConnector]: ------------------------CACSL2BoogieTranslator---------------------------- [2024-06-03 20:33:18,296 INFO L270 PluginConnector]: Initializing CACSL2BoogieTranslator... [2024-06-03 20:33:18,300 INFO L274 PluginConnector]: CACSL2BoogieTranslator initialized [2024-06-03 20:33:18,300 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:33:16" (1/2) ... [2024-06-03 20:33:18,301 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@390bf0e7 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:33:18, skipping insertion in model container [2024-06-03 20:33:18,301 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:33:16" (1/2) ... [2024-06-03 20:33:18,302 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.CACSL2BoogieTranslatorObserver@49b841b2 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator CORRECTNESS_WITNESS 03.06 08:33:18, skipping insertion in model container [2024-06-03 20:33:18,302 INFO L184 PluginConnector]: Executing the observer ACSLObjectContainerObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:33:18" (2/2) ... [2024-06-03 20:33:18,303 INFO L204 PluginConnector]: Invalid model from CACSL2BoogieTranslator for observer de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator.ACSLObjectContainerObserver@390bf0e7 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:18, skipping insertion in model container [2024-06-03 20:33:18,303 INFO L184 PluginConnector]: Executing the observer CACSL2BoogieTranslatorObserver from plugin CACSL2BoogieTranslator for "CDTParser AST 03.06 08:33:18" (2/2) ... [2024-06-03 20:33:18,303 INFO L83 nessWitnessExtractor]: Extracting all invariants from correctness witness [2024-06-03 20:33:18,345 INFO L95 edCorrectnessWitness]: Found the following entries in the witness: [2024-06-03 20:33:18,346 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))) [2024-06-03 20:33:18,346 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))) [2024-06-03 20:33:18,346 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))) [2024-06-03 20:33:18,347 INFO L103 edCorrectnessWitness]: ghost_variable multithreaded = 0 [2024-06-03 20:33:18,347 INFO L106 edCorrectnessWitness]: ghost_update [L779-L779] multithreaded = 1; [2024-06-03 20:33:18,382 INFO L177 MainTranslator]: Built tables and reachable declarations [2024-06-03 20:33:18,672 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:33:18,680 INFO L202 MainTranslator]: Completed pre-run Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local Start Parsing Local [2024-06-03 20:33:18,821 INFO L207 PostProcessor]: Analyzing one entry point: main [2024-06-03 20:33:18,865 INFO L206 MainTranslator]: Completed translation [2024-06-03 20:33:18,865 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:18 WrapperNode [2024-06-03 20:33:18,866 INFO L131 PluginConnector]: ------------------------ END CACSL2BoogieTranslator---------------------------- [2024-06-03 20:33:18,867 INFO L112 PluginConnector]: ------------------------Boogie Procedure Inliner---------------------------- [2024-06-03 20:33:18,867 INFO L270 PluginConnector]: Initializing Boogie Procedure Inliner... [2024-06-03 20:33:18,868 INFO L274 PluginConnector]: Boogie Procedure Inliner initialized [2024-06-03 20:33:18,873 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:18" (1/1) ... [2024-06-03 20:33:18,896 INFO L184 PluginConnector]: Executing the observer Inliner from plugin Boogie Procedure Inliner for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:18" (1/1) ... [2024-06-03 20:33:18,932 INFO L138 Inliner]: procedures = 175, calls = 42, calls flagged for inlining = 5, calls inlined = 5, statements flattened = 66 [2024-06-03 20:33:18,933 INFO L131 PluginConnector]: ------------------------ END Boogie Procedure Inliner---------------------------- [2024-06-03 20:33:18,934 INFO L112 PluginConnector]: ------------------------Boogie Preprocessor---------------------------- [2024-06-03 20:33:18,934 INFO L270 PluginConnector]: Initializing Boogie Preprocessor... [2024-06-03 20:33:18,934 INFO L274 PluginConnector]: Boogie Preprocessor initialized [2024-06-03 20:33:18,943 INFO L184 PluginConnector]: Executing the observer EnsureBoogieModelObserver from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:18" (1/1) ... [2024-06-03 20:33:18,944 INFO L184 PluginConnector]: Executing the observer TypeChecker from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:18" (1/1) ... [2024-06-03 20:33:18,950 INFO L184 PluginConnector]: Executing the observer MemorySlicer from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:18" (1/1) ... [2024-06-03 20:33:18,970 INFO L175 MemorySlicer]: Split 2 memory accesses to 1 slices as follows [2]. 100 percent of accesses are in the largest equivalence class. The 2 initializations are split as follows [2]. The 0 writes are split as follows [0]. [2024-06-03 20:33:18,970 INFO L184 PluginConnector]: Executing the observer ConstExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:18" (1/1) ... [2024-06-03 20:33:18,971 INFO L184 PluginConnector]: Executing the observer StructExpander from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:18" (1/1) ... [2024-06-03 20:33:18,976 INFO L184 PluginConnector]: Executing the observer UnstructureCode from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:18" (1/1) ... [2024-06-03 20:33:18,977 INFO L184 PluginConnector]: Executing the observer FunctionInliner from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:18" (1/1) ... [2024-06-03 20:33:18,979 INFO L184 PluginConnector]: Executing the observer LTLStepAnnotator from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:18" (1/1) ... [2024-06-03 20:33:18,980 INFO L184 PluginConnector]: Executing the observer BoogieSymbolTableConstructor from plugin Boogie Preprocessor for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:18" (1/1) ... [2024-06-03 20:33:18,982 INFO L131 PluginConnector]: ------------------------ END Boogie Preprocessor---------------------------- [2024-06-03 20:33:18,983 INFO L112 PluginConnector]: ------------------------RCFGBuilder---------------------------- [2024-06-03 20:33:18,983 INFO L270 PluginConnector]: Initializing RCFGBuilder... [2024-06-03 20:33:18,983 INFO L274 PluginConnector]: RCFGBuilder initialized [2024-06-03 20:33:18,983 INFO L184 PluginConnector]: Executing the observer RCFGBuilderObserver from plugin RCFGBuilder for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:18" (1/1) ... [2024-06-03 20:33:18,988 INFO L173 SolverBuilder]: Constructing external solver with command: z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 [2024-06-03 20:33:18,993 INFO L189 MonitoredProcess]: No working directory specified, using /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 [2024-06-03 20:33:19,007 INFO L229 MonitoredProcess]: Starting monitored process 1 with /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (exit command is (exit), workingDir is null) [2024-06-03 20:33:19,040 INFO L327 MonitoredProcess]: [MP /storage/repos/ultimate/releaseScripts/default/UAutomizer-linux/z3 SMTLIB2_COMPLIANT=true -memory:2024 -smt2 -in -t:4000 (1)] Waiting until timeout for monitored process [2024-06-03 20:33:19,051 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_begin [2024-06-03 20:33:19,051 INFO L130 BoogieDeclarations]: Found specification of procedure #Ultimate.allocInit [2024-06-03 20:33:19,051 INFO L130 BoogieDeclarations]: Found specification of procedure P0 [2024-06-03 20:33:19,051 INFO L138 BoogieDeclarations]: Found implementation of procedure P0 [2024-06-03 20:33:19,051 INFO L130 BoogieDeclarations]: Found specification of procedure P1 [2024-06-03 20:33:19,051 INFO L138 BoogieDeclarations]: Found implementation of procedure P1 [2024-06-03 20:33:19,052 INFO L130 BoogieDeclarations]: Found specification of procedure P2 [2024-06-03 20:33:19,052 INFO L138 BoogieDeclarations]: Found implementation of procedure P2 [2024-06-03 20:33:19,052 INFO L130 BoogieDeclarations]: Found specification of procedure write~init~int#0 [2024-06-03 20:33:19,052 INFO L130 BoogieDeclarations]: Found specification of procedure __VERIFIER_atomic_end [2024-06-03 20:33:19,052 INFO L130 BoogieDeclarations]: Found specification of procedure ULTIMATE.start [2024-06-03 20:33:19,052 INFO L138 BoogieDeclarations]: Found implementation of procedure ULTIMATE.start [2024-06-03 20:33:19,053 WARN L214 CfgBuilder]: User set CodeBlockSize to SequenceOfStatements but program contains fork statements. Overwriting the user preferences and setting CodeBlockSize to OneNontrivialStatement [2024-06-03 20:33:19,145 INFO L244 CfgBuilder]: Building ICFG [2024-06-03 20:33:19,146 INFO L270 CfgBuilder]: Building CFG for each procedure with an implementation [2024-06-03 20:33:19,500 INFO L289 CfgBuilder]: Ommited future-live optimization because the input is a concurrent program. [2024-06-03 20:33:19,500 INFO L293 CfgBuilder]: Performing block encoding [2024-06-03 20:33:19,568 INFO L315 CfgBuilder]: Using the 1 location(s) as analysis (start of procedure ULTIMATE.start) [2024-06-03 20:33:19,569 INFO L320 CfgBuilder]: Removed 0 assume(true) statements. [2024-06-03 20:33:19,569 INFO L201 PluginConnector]: Adding new model de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:33:19 BoogieIcfgContainer [2024-06-03 20:33:19,570 INFO L131 PluginConnector]: ------------------------ END RCFGBuilder---------------------------- [2024-06-03 20:33:19,572 INFO L112 PluginConnector]: ------------------------TraceAbstraction---------------------------- [2024-06-03 20:33:19,573 INFO L270 PluginConnector]: Initializing TraceAbstraction... [2024-06-03 20:33:19,575 INFO L274 PluginConnector]: TraceAbstraction initialized [2024-06-03 20:33:19,575 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "witness.yml de.uni_freiburg.informatik.ultimate.witnessparser CORRECTNESS_WITNESS 03.06 08:33:16" (1/4) ... [2024-06-03 20:33:19,576 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d01e90 and model type witness.yml de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction CORRECTNESS_WITNESS 03.06 08:33:19, skipping insertion in model container [2024-06-03 20:33:19,576 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "CDTParser AST 03.06 08:33:18" (2/4) ... [2024-06-03 20:33:19,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d01e90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:33:19, skipping insertion in model container [2024-06-03 20:33:19,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.cacsl2boogietranslator AST 03.06 08:33:18" (3/4) ... [2024-06-03 20:33:19,577 INFO L204 PluginConnector]: Invalid model from TraceAbstraction for observer de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction.TraceAbstractionObserver@22d01e90 and model type de.uni_freiburg.informatik.ultimate.plugins.generator.traceabstraction AST 03.06 08:33:19, skipping insertion in model container [2024-06-03 20:33:19,577 INFO L184 PluginConnector]: Executing the observer TraceAbstractionObserver from plugin TraceAbstraction for "de.uni_freiburg.informatik.ultimate.plugins.generator.rcfgbuilder CFG 03.06 08:33:19" (4/4) ... [2024-06-03 20:33:19,578 INFO L112 eAbstractionObserver]: Analyzing ICFG safe003_tso.i [2024-06-03 20:33:19,590 INFO L204 ceAbstractionStarter]: Automizer settings: Hoare:false NWA Interpolation:FPandBP Determinization: PREDICATE_ABSTRACTION [2024-06-03 20:33:19,590 INFO L163 ceAbstractionStarter]: Applying trace abstraction to program that has 3 error locations. [2024-06-03 20:33:19,590 INFO L522 ceAbstractionStarter]: Constructing petrified ICFG for 1 thread instances. [2024-06-03 20:33:19,642 INFO L144 ThreadInstanceAdder]: Constructed 0 joinOtherThreadTransitions. [2024-06-03 20:33:19,673 INFO L73 FinitePrefix]: Start finitePrefix. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:33:19,705 INFO L124 PetriNetUnfolderBase]: 0/38 cut-off events. [2024-06-03 20:33:19,705 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:33:19,707 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. [2024-06-03 20:33:19,707 INFO L82 GeneralOperation]: Start removeDead. Operand has 51 places, 41 transitions, 94 flow [2024-06-03 20:33:19,710 INFO L88 GeneralOperation]: Finished RemoveDead, result has has 42 places, 32 transitions, 73 flow [2024-06-03 20:33:19,722 INFO L356 AbstractCegarLoop]: ======== Iteration 0 == of CEGAR loop == AllErrorsAtOnce ======== [2024-06-03 20:33:19,728 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;@5415fb7a, mLbeIndependenceSettings=[IndependenceType=SEMANTIC, AbstractionType=NONE, UseConditional=false, UseSemiCommutativity=true, Solver=Z3, SolverTimeout=1000ms] [2024-06-03 20:33:19,729 INFO L358 AbstractCegarLoop]: Starting to check reachability of 6 error locations. [2024-06-03 20:33:19,733 INFO L185 PetriNetUnfolderBase]: Found word, exiting Unfolder. [2024-06-03 20:33:19,733 INFO L124 PetriNetUnfolderBase]: 0/6 cut-off events. [2024-06-03 20:33:19,733 INFO L125 PetriNetUnfolderBase]: For 0/0 co-relation queries the response was YES. [2024-06-03 20:33:19,733 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:19,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1] [2024-06-03 20:33:19,735 INFO L420 AbstractCegarLoop]: === Iteration 1 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:19,738 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:19,738 INFO L85 PathProgramCache]: Analyzing trace with hash -1782945868, now seen corresponding path program 1 times [2024-06-03 20:33:19,749 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:19,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1571656641] [2024-06-03 20:33:19,751 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:19,751 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:19,867 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:20,445 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:20,445 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:20,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1571656641] [2024-06-03 20:33:20,446 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1571656641] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:20,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:20,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [1] imperfect sequences [] total 1 [2024-06-03 20:33:20,448 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [858634587] [2024-06-03 20:33:20,449 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:20,454 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 3 states [2024-06-03 20:33:20,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:20,478 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 3 interpolants. [2024-06-03 20:33:20,479 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=3, Invalid=3, Unknown=0, NotChecked=0, Total=6 [2024-06-03 20:33:20,509 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 16 out of 41 [2024-06-03 20:33:20,511 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) [2024-06-03 20:33:20,512 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:20,512 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 16 of 41 [2024-06-03 20:33:20,513 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:20,701 INFO L124 PetriNetUnfolderBase]: 474/803 cut-off events. [2024-06-03 20:33:20,702 INFO L125 PetriNetUnfolderBase]: For 23/23 co-relation queries the response was YES. [2024-06-03 20:33:20,707 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. [2024-06-03 20:33:20,712 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 29 selfloop transitions, 4 changer transitions 0/42 dead transitions. [2024-06-03 20:33:20,713 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 44 places, 42 transitions, 165 flow [2024-06-03 20:33:20,714 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 3 states. [2024-06-03 20:33:20,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 3 states. [2024-06-03 20:33:20,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 3 states to 3 states and 84 transitions. [2024-06-03 20:33:20,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6829268292682927 [2024-06-03 20:33:20,723 INFO L175 Difference]: Start difference. First operand has 42 places, 32 transitions, 73 flow. Second operand 3 states and 84 transitions. [2024-06-03 20:33:20,724 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 44 places, 42 transitions, 165 flow [2024-06-03 20:33:20,726 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 41 places, 42 transitions, 160 flow, removed 0 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:20,729 INFO L231 Difference]: Finished difference. Result has 42 places, 35 transitions, 100 flow [2024-06-03 20:33:20,730 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} [2024-06-03 20:33:20,733 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 0 predicate places. [2024-06-03 20:33:20,733 INFO L495 AbstractCegarLoop]: Abstraction has has 42 places, 35 transitions, 100 flow [2024-06-03 20:33:20,734 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) [2024-06-03 20:33:20,734 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:20,734 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:20,734 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable0 [2024-06-03 20:33:20,734 INFO L420 AbstractCegarLoop]: === Iteration 2 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:20,735 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:20,735 INFO L85 PathProgramCache]: Analyzing trace with hash 280983315, now seen corresponding path program 1 times [2024-06-03 20:33:20,735 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:20,736 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585710005] [2024-06-03 20:33:20,736 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:20,736 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:20,757 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:21,037 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:21,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:21,038 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585710005] [2024-06-03 20:33:21,038 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585710005] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:21,038 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:21,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [2] imperfect sequences [] total 2 [2024-06-03 20:33:21,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1967169010] [2024-06-03 20:33:21,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:21,041 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 4 states [2024-06-03 20:33:21,041 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:21,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 4 interpolants. [2024-06-03 20:33:21,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=6, Invalid=6, Unknown=0, NotChecked=0, Total=12 [2024-06-03 20:33:21,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:33:21,073 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) [2024-06-03 20:33:21,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:21,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:33:21,074 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:21,241 INFO L124 PetriNetUnfolderBase]: 742/1215 cut-off events. [2024-06-03 20:33:21,241 INFO L125 PetriNetUnfolderBase]: For 234/237 co-relation queries the response was YES. [2024-06-03 20:33:21,243 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. [2024-06-03 20:33:21,249 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 44 selfloop transitions, 10 changer transitions 0/61 dead transitions. [2024-06-03 20:33:21,249 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 45 places, 61 transitions, 282 flow [2024-06-03 20:33:21,250 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:33:21,250 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:33:21,252 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 109 transitions. [2024-06-03 20:33:21,252 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6646341463414634 [2024-06-03 20:33:21,252 INFO L175 Difference]: Start difference. First operand has 42 places, 35 transitions, 100 flow. Second operand 4 states and 109 transitions. [2024-06-03 20:33:21,253 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 45 places, 61 transitions, 282 flow [2024-06-03 20:33:21,254 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 44 places, 61 transitions, 276 flow, removed 0 selfloop flow, removed 1 redundant places. [2024-06-03 20:33:21,257 INFO L231 Difference]: Finished difference. Result has 46 places, 44 transitions, 171 flow [2024-06-03 20:33:21,257 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} [2024-06-03 20:33:21,257 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 4 predicate places. [2024-06-03 20:33:21,258 INFO L495 AbstractCegarLoop]: Abstraction has has 46 places, 44 transitions, 171 flow [2024-06-03 20:33:21,258 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) [2024-06-03 20:33:21,258 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:21,259 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:21,261 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable1 [2024-06-03 20:33:21,261 INFO L420 AbstractCegarLoop]: === Iteration 3 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:21,261 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:21,262 INFO L85 PathProgramCache]: Analyzing trace with hash 120548589, now seen corresponding path program 1 times [2024-06-03 20:33:21,262 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:21,266 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [477505890] [2024-06-03 20:33:21,266 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:21,267 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:21,285 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:21,542 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:21,543 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:21,543 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [477505890] [2024-06-03 20:33:21,543 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [477505890] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:21,543 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:21,543 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:33:21,544 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [199157652] [2024-06-03 20:33:21,544 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:21,545 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:33:21,546 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:21,546 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:33:21,547 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:33:21,587 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:21,588 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) [2024-06-03 20:33:21,589 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:21,589 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:21,589 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:21,778 INFO L124 PetriNetUnfolderBase]: 926/1521 cut-off events. [2024-06-03 20:33:21,779 INFO L125 PetriNetUnfolderBase]: For 1002/1002 co-relation queries the response was YES. [2024-06-03 20:33:21,780 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. [2024-06-03 20:33:21,786 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 58 selfloop transitions, 10 changer transitions 0/74 dead transitions. [2024-06-03 20:33:21,786 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 50 places, 74 transitions, 396 flow [2024-06-03 20:33:21,786 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:21,786 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:21,787 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-03 20:33:21,787 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-03 20:33:21,787 INFO L175 Difference]: Start difference. First operand has 46 places, 44 transitions, 171 flow. Second operand 5 states and 124 transitions. [2024-06-03 20:33:21,787 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 50 places, 74 transitions, 396 flow [2024-06-03 20:33:21,789 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 50 places, 74 transitions, 394 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-03 20:33:21,790 INFO L231 Difference]: Finished difference. Result has 53 places, 53 transitions, 256 flow [2024-06-03 20:33:21,790 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} [2024-06-03 20:33:21,791 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 11 predicate places. [2024-06-03 20:33:21,791 INFO L495 AbstractCegarLoop]: Abstraction has has 53 places, 53 transitions, 256 flow [2024-06-03 20:33:21,791 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) [2024-06-03 20:33:21,791 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:21,791 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:21,791 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable2 [2024-06-03 20:33:21,792 INFO L420 AbstractCegarLoop]: === Iteration 4 === Targeting ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:21,792 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:21,792 INFO L85 PathProgramCache]: Analyzing trace with hash -1838225564, now seen corresponding path program 1 times [2024-06-03 20:33:21,792 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:21,792 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [55656270] [2024-06-03 20:33:21,792 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:21,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:21,800 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:22,038 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:22,038 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:22,039 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [55656270] [2024-06-03 20:33:22,039 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [55656270] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:22,039 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:22,039 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:22,039 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854554749] [2024-06-03 20:33:22,039 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:22,040 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:22,040 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:22,040 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:22,041 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:22,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:22,081 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) [2024-06-03 20:33:22,081 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:22,081 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:22,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:22,287 INFO L124 PetriNetUnfolderBase]: 917/1504 cut-off events. [2024-06-03 20:33:22,287 INFO L125 PetriNetUnfolderBase]: For 1558/1558 co-relation queries the response was YES. [2024-06-03 20:33:22,290 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. [2024-06-03 20:33:22,297 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 62 selfloop transitions, 12 changer transitions 0/80 dead transitions. [2024-06-03 20:33:22,297 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 57 places, 80 transitions, 472 flow [2024-06-03 20:33:22,297 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:22,298 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:22,298 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 20:33:22,298 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-03 20:33:22,299 INFO L175 Difference]: Start difference. First operand has 53 places, 53 transitions, 256 flow. Second operand 6 states and 143 transitions. [2024-06-03 20:33:22,299 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 57 places, 80 transitions, 472 flow [2024-06-03 20:33:22,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 80 transitions, 470 flow, removed 1 selfloop flow, removed 0 redundant places. [2024-06-03 20:33:22,302 INFO L231 Difference]: Finished difference. Result has 58 places, 54 transitions, 291 flow [2024-06-03 20:33:22,303 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} [2024-06-03 20:33:22,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 16 predicate places. [2024-06-03 20:33:22,304 INFO L495 AbstractCegarLoop]: Abstraction has has 58 places, 54 transitions, 291 flow [2024-06-03 20:33:22,304 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) [2024-06-03 20:33:22,304 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:22,304 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:22,304 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable3 [2024-06-03 20:33:22,305 INFO L420 AbstractCegarLoop]: === Iteration 5 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:22,305 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:22,305 INFO L85 PathProgramCache]: Analyzing trace with hash 1910852492, now seen corresponding path program 1 times [2024-06-03 20:33:22,305 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:22,305 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1506815328] [2024-06-03 20:33:22,306 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:22,306 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:22,319 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:22,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:22,664 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:22,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1506815328] [2024-06-03 20:33:22,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1506815328] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:22,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:22,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:33:22,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [560088839] [2024-06-03 20:33:22,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:22,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:33:22,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:22,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:33:22,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:33:22,691 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:22,692 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) [2024-06-03 20:33:22,692 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:22,692 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:22,692 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:22,847 INFO L124 PetriNetUnfolderBase]: 904/1471 cut-off events. [2024-06-03 20:33:22,847 INFO L125 PetriNetUnfolderBase]: For 2290/2301 co-relation queries the response was YES. [2024-06-03 20:33:22,851 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. [2024-06-03 20:33:22,857 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 47 selfloop transitions, 14 changer transitions 0/67 dead transitions. [2024-06-03 20:33:22,857 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 61 places, 67 transitions, 452 flow [2024-06-03 20:33:22,857 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:33:22,858 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:33:22,858 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 100 transitions. [2024-06-03 20:33:22,858 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:33:22,858 INFO L175 Difference]: Start difference. First operand has 58 places, 54 transitions, 291 flow. Second operand 4 states and 100 transitions. [2024-06-03 20:33:22,858 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 61 places, 67 transitions, 452 flow [2024-06-03 20:33:22,861 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 57 places, 67 transitions, 425 flow, removed 3 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:22,862 INFO L231 Difference]: Finished difference. Result has 59 places, 56 transitions, 326 flow [2024-06-03 20:33:22,862 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} [2024-06-03 20:33:22,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 17 predicate places. [2024-06-03 20:33:22,863 INFO L495 AbstractCegarLoop]: Abstraction has has 59 places, 56 transitions, 326 flow [2024-06-03 20:33:22,863 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) [2024-06-03 20:33:22,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:22,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:22,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable4 [2024-06-03 20:33:22,863 INFO L420 AbstractCegarLoop]: === Iteration 6 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:22,864 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:22,864 INFO L85 PathProgramCache]: Analyzing trace with hash 2078014321, now seen corresponding path program 1 times [2024-06-03 20:33:22,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:22,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791148625] [2024-06-03 20:33:22,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:22,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:22,873 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:23,244 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:23,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:23,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791148625] [2024-06-03 20:33:23,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791148625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:23,245 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:23,245 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:23,245 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [799418483] [2024-06-03 20:33:23,245 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:23,245 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:23,246 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:23,246 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:23,246 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:23,280 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:23,280 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) [2024-06-03 20:33:23,281 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:23,281 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:23,281 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:23,474 INFO L124 PetriNetUnfolderBase]: 931/1525 cut-off events. [2024-06-03 20:33:23,474 INFO L125 PetriNetUnfolderBase]: For 2825/2825 co-relation queries the response was YES. [2024-06-03 20:33:23,478 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. [2024-06-03 20:33:23,485 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 62 selfloop transitions, 27 changer transitions 0/95 dead transitions. [2024-06-03 20:33:23,486 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 64 places, 95 transitions, 672 flow [2024-06-03 20:33:23,486 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:23,486 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:23,487 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-03 20:33:23,487 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-03 20:33:23,487 INFO L175 Difference]: Start difference. First operand has 59 places, 56 transitions, 326 flow. Second operand 6 states and 154 transitions. [2024-06-03 20:33:23,487 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 64 places, 95 transitions, 672 flow [2024-06-03 20:33:23,490 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 63 places, 95 transitions, 657 flow, removed 2 selfloop flow, removed 1 redundant places. [2024-06-03 20:33:23,492 INFO L231 Difference]: Finished difference. Result has 64 places, 66 transitions, 437 flow [2024-06-03 20:33:23,492 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} [2024-06-03 20:33:23,493 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 22 predicate places. [2024-06-03 20:33:23,493 INFO L495 AbstractCegarLoop]: Abstraction has has 64 places, 66 transitions, 437 flow [2024-06-03 20:33:23,493 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) [2024-06-03 20:33:23,493 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:23,493 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:23,493 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable5 [2024-06-03 20:33:23,493 INFO L420 AbstractCegarLoop]: === Iteration 7 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:23,494 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:23,494 INFO L85 PathProgramCache]: Analyzing trace with hash -1067490523, now seen corresponding path program 2 times [2024-06-03 20:33:23,494 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:23,494 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1258310881] [2024-06-03 20:33:23,494 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:23,494 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:23,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:23,836 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:23,837 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:23,837 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1258310881] [2024-06-03 20:33:23,837 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1258310881] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:23,837 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:23,837 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:23,837 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [689611613] [2024-06-03 20:33:23,837 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:23,838 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:23,838 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:23,838 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:23,838 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:23,868 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:23,868 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) [2024-06-03 20:33:23,868 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:23,868 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:23,868 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:24,111 INFO L124 PetriNetUnfolderBase]: 953/1566 cut-off events. [2024-06-03 20:33:24,112 INFO L125 PetriNetUnfolderBase]: For 4244/4244 co-relation queries the response was YES. [2024-06-03 20:33:24,116 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. [2024-06-03 20:33:24,126 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 66 selfloop transitions, 22 changer transitions 0/94 dead transitions. [2024-06-03 20:33:24,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 69 places, 94 transitions, 727 flow [2024-06-03 20:33:24,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:24,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:24,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 20:33:24,128 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:33:24,128 INFO L175 Difference]: Start difference. First operand has 64 places, 66 transitions, 437 flow. Second operand 6 states and 144 transitions. [2024-06-03 20:33:24,128 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 69 places, 94 transitions, 727 flow [2024-06-03 20:33:24,134 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 68 places, 94 transitions, 697 flow, removed 9 selfloop flow, removed 1 redundant places. [2024-06-03 20:33:24,135 INFO L231 Difference]: Finished difference. Result has 69 places, 72 transitions, 523 flow [2024-06-03 20:33:24,136 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} [2024-06-03 20:33:24,136 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 27 predicate places. [2024-06-03 20:33:24,136 INFO L495 AbstractCegarLoop]: Abstraction has has 69 places, 72 transitions, 523 flow [2024-06-03 20:33:24,137 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) [2024-06-03 20:33:24,137 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:24,137 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:24,137 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable6 [2024-06-03 20:33:24,137 INFO L420 AbstractCegarLoop]: === Iteration 8 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:24,137 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:24,138 INFO L85 PathProgramCache]: Analyzing trace with hash -313009423, now seen corresponding path program 3 times [2024-06-03 20:33:24,138 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:24,138 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [524963606] [2024-06-03 20:33:24,138 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:24,138 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:24,146 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:24,457 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:24,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:24,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [524963606] [2024-06-03 20:33:24,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [524963606] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:24,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:24,458 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:24,458 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [301576166] [2024-06-03 20:33:24,458 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:24,458 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:24,458 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:24,459 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:24,459 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:24,490 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:24,491 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) [2024-06-03 20:33:24,491 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:24,491 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:24,491 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:24,738 INFO L124 PetriNetUnfolderBase]: 959/1580 cut-off events. [2024-06-03 20:33:24,739 INFO L125 PetriNetUnfolderBase]: For 5340/5340 co-relation queries the response was YES. [2024-06-03 20:33:24,742 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. [2024-06-03 20:33:24,750 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 65 selfloop transitions, 31 changer transitions 0/102 dead transitions. [2024-06-03 20:33:24,750 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 74 places, 102 transitions, 833 flow [2024-06-03 20:33:24,750 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:24,751 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:24,751 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-03 20:33:24,751 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-03 20:33:24,751 INFO L175 Difference]: Start difference. First operand has 69 places, 72 transitions, 523 flow. Second operand 6 states and 151 transitions. [2024-06-03 20:33:24,751 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 74 places, 102 transitions, 833 flow [2024-06-03 20:33:24,759 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 71 places, 102 transitions, 775 flow, removed 10 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:24,760 INFO L231 Difference]: Finished difference. Result has 73 places, 75 transitions, 578 flow [2024-06-03 20:33:24,761 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} [2024-06-03 20:33:24,761 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 31 predicate places. [2024-06-03 20:33:24,761 INFO L495 AbstractCegarLoop]: Abstraction has has 73 places, 75 transitions, 578 flow [2024-06-03 20:33:24,761 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) [2024-06-03 20:33:24,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:24,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:24,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable7 [2024-06-03 20:33:24,762 INFO L420 AbstractCegarLoop]: === Iteration 9 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:24,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:24,762 INFO L85 PathProgramCache]: Analyzing trace with hash -312763159, now seen corresponding path program 1 times [2024-06-03 20:33:24,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:24,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121241893] [2024-06-03 20:33:24,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:24,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:24,770 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:25,075 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:25,076 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:25,076 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121241893] [2024-06-03 20:33:25,076 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121241893] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:25,076 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:25,076 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:25,076 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2110475235] [2024-06-03 20:33:25,076 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:25,077 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:25,077 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:25,077 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:25,077 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:25,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:25,118 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) [2024-06-03 20:33:25,118 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:25,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:25,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:25,313 INFO L124 PetriNetUnfolderBase]: 968/1598 cut-off events. [2024-06-03 20:33:25,313 INFO L125 PetriNetUnfolderBase]: For 6843/6857 co-relation queries the response was YES. [2024-06-03 20:33:25,317 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. [2024-06-03 20:33:25,325 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 68 selfloop transitions, 20 changer transitions 0/94 dead transitions. [2024-06-03 20:33:25,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 77 places, 94 transitions, 814 flow [2024-06-03 20:33:25,325 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:25,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:25,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 121 transitions. [2024-06-03 20:33:25,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5902439024390244 [2024-06-03 20:33:25,326 INFO L175 Difference]: Start difference. First operand has 73 places, 75 transitions, 578 flow. Second operand 5 states and 121 transitions. [2024-06-03 20:33:25,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 77 places, 94 transitions, 814 flow [2024-06-03 20:33:25,334 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 73 places, 94 transitions, 750 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:25,336 INFO L231 Difference]: Finished difference. Result has 74 places, 78 transitions, 588 flow [2024-06-03 20:33:25,336 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} [2024-06-03 20:33:25,336 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 32 predicate places. [2024-06-03 20:33:25,336 INFO L495 AbstractCegarLoop]: Abstraction has has 74 places, 78 transitions, 588 flow [2024-06-03 20:33:25,337 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) [2024-06-03 20:33:25,337 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:25,337 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:25,337 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable8 [2024-06-03 20:33:25,340 INFO L420 AbstractCegarLoop]: === Iteration 10 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:25,341 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:25,341 INFO L85 PathProgramCache]: Analyzing trace with hash -6064227, now seen corresponding path program 1 times [2024-06-03 20:33:25,341 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:25,341 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1393835728] [2024-06-03 20:33:25,341 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:25,342 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:25,349 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:25,636 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:25,636 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:25,636 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1393835728] [2024-06-03 20:33:25,637 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1393835728] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:25,637 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:25,637 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:25,637 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1404437357] [2024-06-03 20:33:25,637 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:25,637 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:25,638 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:25,638 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:25,638 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:25,676 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:25,676 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) [2024-06-03 20:33:25,676 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:25,676 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:25,677 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:25,927 INFO L124 PetriNetUnfolderBase]: 963/1581 cut-off events. [2024-06-03 20:33:25,927 INFO L125 PetriNetUnfolderBase]: For 6420/6420 co-relation queries the response was YES. [2024-06-03 20:33:25,932 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. [2024-06-03 20:33:25,940 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 70 selfloop transitions, 37 changer transitions 0/113 dead transitions. [2024-06-03 20:33:25,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 81 places, 113 transitions, 922 flow [2024-06-03 20:33:25,942 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:33:25,942 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:33:25,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:33:25,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-03 20:33:25,943 INFO L175 Difference]: Start difference. First operand has 74 places, 78 transitions, 588 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:33:25,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 81 places, 113 transitions, 922 flow [2024-06-03 20:33:25,951 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 78 places, 113 transitions, 872 flow, removed 7 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:25,952 INFO L231 Difference]: Finished difference. Result has 79 places, 78 transitions, 620 flow [2024-06-03 20:33:25,952 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} [2024-06-03 20:33:25,953 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 37 predicate places. [2024-06-03 20:33:25,953 INFO L495 AbstractCegarLoop]: Abstraction has has 79 places, 78 transitions, 620 flow [2024-06-03 20:33:25,953 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) [2024-06-03 20:33:25,954 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:25,954 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:25,954 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable9 [2024-06-03 20:33:25,954 INFO L420 AbstractCegarLoop]: === Iteration 11 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:25,954 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:25,954 INFO L85 PathProgramCache]: Analyzing trace with hash -492411141, now seen corresponding path program 2 times [2024-06-03 20:33:25,955 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:25,955 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2080854268] [2024-06-03 20:33:25,955 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:25,955 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:25,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:26,235 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:26,235 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:26,236 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2080854268] [2024-06-03 20:33:26,236 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2080854268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:26,236 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:26,236 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:26,236 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [644978623] [2024-06-03 20:33:26,236 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:26,236 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:26,237 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:26,237 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:26,237 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:26,265 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:26,266 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) [2024-06-03 20:33:26,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:26,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:26,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:26,494 INFO L124 PetriNetUnfolderBase]: 974/1609 cut-off events. [2024-06-03 20:33:26,494 INFO L125 PetriNetUnfolderBase]: For 7869/7880 co-relation queries the response was YES. [2024-06-03 20:33:26,499 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. [2024-06-03 20:33:26,505 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 66 selfloop transitions, 29 changer transitions 0/101 dead transitions. [2024-06-03 20:33:26,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 101 transitions, 926 flow [2024-06-03 20:33:26,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:26,506 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:26,506 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-03 20:33:26,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-03 20:33:26,506 INFO L175 Difference]: Start difference. First operand has 79 places, 78 transitions, 620 flow. Second operand 5 states and 126 transitions. [2024-06-03 20:33:26,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 101 transitions, 926 flow [2024-06-03 20:33:26,512 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 75 places, 101 transitions, 803 flow, removed 8 selfloop flow, removed 8 redundant places. [2024-06-03 20:33:26,513 INFO L231 Difference]: Finished difference. Result has 76 places, 81 transitions, 594 flow [2024-06-03 20:33:26,514 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} [2024-06-03 20:33:26,514 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 34 predicate places. [2024-06-03 20:33:26,514 INFO L495 AbstractCegarLoop]: Abstraction has has 76 places, 81 transitions, 594 flow [2024-06-03 20:33:26,514 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) [2024-06-03 20:33:26,515 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:26,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:26,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable10 [2024-06-03 20:33:26,515 INFO L420 AbstractCegarLoop]: === Iteration 12 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:26,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:26,515 INFO L85 PathProgramCache]: Analyzing trace with hash 742137513, now seen corresponding path program 3 times [2024-06-03 20:33:26,516 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:26,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1431142665] [2024-06-03 20:33:26,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:26,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:26,523 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:26,812 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:26,812 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:26,812 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1431142665] [2024-06-03 20:33:26,813 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1431142665] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:26,813 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:26,813 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:26,813 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [684325801] [2024-06-03 20:33:26,813 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:26,813 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:26,814 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:26,814 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:26,815 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:26,862 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:26,863 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) [2024-06-03 20:33:26,863 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:26,863 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:26,863 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:27,157 INFO L124 PetriNetUnfolderBase]: 969/1599 cut-off events. [2024-06-03 20:33:27,157 INFO L125 PetriNetUnfolderBase]: For 8228/8231 co-relation queries the response was YES. [2024-06-03 20:33:27,161 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. [2024-06-03 20:33:27,167 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 73 selfloop transitions, 35 changer transitions 0/114 dead transitions. [2024-06-03 20:33:27,167 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 83 places, 114 transitions, 894 flow [2024-06-03 20:33:27,167 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:33:27,168 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:33:27,168 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 20:33:27,169 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-03 20:33:27,169 INFO L175 Difference]: Start difference. First operand has 76 places, 81 transitions, 594 flow. Second operand 8 states and 188 transitions. [2024-06-03 20:33:27,169 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 83 places, 114 transitions, 894 flow [2024-06-03 20:33:27,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 81 places, 114 transitions, 846 flow, removed 6 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:27,181 INFO L231 Difference]: Finished difference. Result has 82 places, 81 transitions, 624 flow [2024-06-03 20:33:27,182 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} [2024-06-03 20:33:27,183 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 40 predicate places. [2024-06-03 20:33:27,183 INFO L495 AbstractCegarLoop]: Abstraction has has 82 places, 81 transitions, 624 flow [2024-06-03 20:33:27,184 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) [2024-06-03 20:33:27,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:27,184 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:27,184 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable11 [2024-06-03 20:33:27,184 INFO L420 AbstractCegarLoop]: === Iteration 13 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:27,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:27,185 INFO L85 PathProgramCache]: Analyzing trace with hash 1796972016, now seen corresponding path program 1 times [2024-06-03 20:33:27,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:27,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1417206812] [2024-06-03 20:33:27,185 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:27,185 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:27,195 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:27,515 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:27,516 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:27,516 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1417206812] [2024-06-03 20:33:27,516 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1417206812] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:27,516 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:27,516 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:27,516 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866796894] [2024-06-03 20:33:27,516 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:27,517 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:27,517 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:27,517 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:27,517 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:27,592 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:27,592 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) [2024-06-03 20:33:27,592 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:27,592 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:27,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:27,832 INFO L124 PetriNetUnfolderBase]: 1072/1756 cut-off events. [2024-06-03 20:33:27,832 INFO L125 PetriNetUnfolderBase]: For 11198/11198 co-relation queries the response was YES. [2024-06-03 20:33:27,838 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. [2024-06-03 20:33:27,844 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 71 selfloop transitions, 44 changer transitions 0/121 dead transitions. [2024-06-03 20:33:27,844 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 88 places, 121 transitions, 1034 flow [2024-06-03 20:33:27,845 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:27,845 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:27,845 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:33:27,845 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-03 20:33:27,846 INFO L175 Difference]: Start difference. First operand has 82 places, 81 transitions, 624 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:33:27,846 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 88 places, 121 transitions, 1034 flow [2024-06-03 20:33:27,859 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 79 places, 121 transitions, 923 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 20:33:27,866 INFO L231 Difference]: Finished difference. Result has 80 places, 85 transitions, 652 flow [2024-06-03 20:33:27,866 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} [2024-06-03 20:33:27,867 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 38 predicate places. [2024-06-03 20:33:27,867 INFO L495 AbstractCegarLoop]: Abstraction has has 80 places, 85 transitions, 652 flow [2024-06-03 20:33:27,867 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) [2024-06-03 20:33:27,867 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:27,867 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:27,867 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable12 [2024-06-03 20:33:27,868 INFO L420 AbstractCegarLoop]: === Iteration 14 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:27,868 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:27,871 INFO L85 PathProgramCache]: Analyzing trace with hash 1797032466, now seen corresponding path program 2 times [2024-06-03 20:33:27,871 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:27,871 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [546339446] [2024-06-03 20:33:27,871 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:27,871 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:27,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:28,210 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:28,210 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:28,211 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [546339446] [2024-06-03 20:33:28,211 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [546339446] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:28,211 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:28,211 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:28,211 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75840295] [2024-06-03 20:33:28,211 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:28,211 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:28,212 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:28,212 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:28,212 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:28,257 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:28,257 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) [2024-06-03 20:33:28,257 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:28,257 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:28,257 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:28,520 INFO L124 PetriNetUnfolderBase]: 1089/1783 cut-off events. [2024-06-03 20:33:28,520 INFO L125 PetriNetUnfolderBase]: For 13001/13001 co-relation queries the response was YES. [2024-06-03 20:33:28,526 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. [2024-06-03 20:33:28,532 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 70 selfloop transitions, 41 changer transitions 0/117 dead transitions. [2024-06-03 20:33:28,532 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 86 places, 117 transitions, 974 flow [2024-06-03 20:33:28,533 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:28,533 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:28,533 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:33:28,534 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-03 20:33:28,534 INFO L175 Difference]: Start difference. First operand has 80 places, 85 transitions, 652 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:33:28,534 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 86 places, 117 transitions, 974 flow [2024-06-03 20:33:28,591 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 83 places, 117 transitions, 909 flow, removed 8 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:28,593 INFO L231 Difference]: Finished difference. Result has 84 places, 87 transitions, 704 flow [2024-06-03 20:33:28,593 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} [2024-06-03 20:33:28,593 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 42 predicate places. [2024-06-03 20:33:28,594 INFO L495 AbstractCegarLoop]: Abstraction has has 84 places, 87 transitions, 704 flow [2024-06-03 20:33:28,594 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) [2024-06-03 20:33:28,594 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:28,594 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:28,594 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable13 [2024-06-03 20:33:28,594 INFO L420 AbstractCegarLoop]: === Iteration 15 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:28,595 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:28,595 INFO L85 PathProgramCache]: Analyzing trace with hash 1915120146, now seen corresponding path program 3 times [2024-06-03 20:33:28,595 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:28,595 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [404908939] [2024-06-03 20:33:28,596 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:28,596 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:28,607 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:29,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:29,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:29,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [404908939] [2024-06-03 20:33:29,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [404908939] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:29,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:29,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:29,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [367290552] [2024-06-03 20:33:29,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:29,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:29,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:29,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:29,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:29,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:29,063 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) [2024-06-03 20:33:29,063 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:29,063 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:29,063 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:29,361 INFO L124 PetriNetUnfolderBase]: 1106/1816 cut-off events. [2024-06-03 20:33:29,362 INFO L125 PetriNetUnfolderBase]: For 15179/15179 co-relation queries the response was YES. [2024-06-03 20:33:29,370 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. [2024-06-03 20:33:29,378 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 86 selfloop transitions, 24 changer transitions 0/116 dead transitions. [2024-06-03 20:33:29,378 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 116 transitions, 1020 flow [2024-06-03 20:33:29,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:29,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:29,382 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:33:29,383 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:33:29,383 INFO L175 Difference]: Start difference. First operand has 84 places, 87 transitions, 704 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:33:29,383 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 116 transitions, 1020 flow [2024-06-03 20:33:29,399 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 116 transitions, 925 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 20:33:29,403 INFO L231 Difference]: Finished difference. Result has 86 places, 89 transitions, 696 flow [2024-06-03 20:33:29,404 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} [2024-06-03 20:33:29,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 44 predicate places. [2024-06-03 20:33:29,405 INFO L495 AbstractCegarLoop]: Abstraction has has 86 places, 89 transitions, 696 flow [2024-06-03 20:33:29,406 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) [2024-06-03 20:33:29,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:29,406 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:29,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable14 [2024-06-03 20:33:29,406 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)] === [2024-06-03 20:33:29,407 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:29,407 INFO L85 PathProgramCache]: Analyzing trace with hash 1646935552, now seen corresponding path program 1 times [2024-06-03 20:33:29,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:29,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1643434541] [2024-06-03 20:33:29,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:29,408 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:29,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:29,766 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:29,767 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:29,767 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1643434541] [2024-06-03 20:33:29,767 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1643434541] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:29,767 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:29,767 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:33:29,767 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146954022] [2024-06-03 20:33:29,767 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:29,768 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:33:29,768 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:29,768 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:33:29,768 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=10, Invalid=10, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:33:29,809 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:33:29,809 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) [2024-06-03 20:33:29,809 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:29,809 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:33:29,810 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:30,043 INFO L124 PetriNetUnfolderBase]: 1071/1773 cut-off events. [2024-06-03 20:33:30,043 INFO L125 PetriNetUnfolderBase]: For 16921/16921 co-relation queries the response was YES. [2024-06-03 20:33:30,051 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. [2024-06-03 20:33:30,058 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 81 selfloop transitions, 28 changer transitions 0/120 dead transitions. [2024-06-03 20:33:30,058 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 90 places, 120 transitions, 1094 flow [2024-06-03 20:33:30,058 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:30,059 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:30,059 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-03 20:33:30,059 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-03 20:33:30,059 INFO L175 Difference]: Start difference. First operand has 86 places, 89 transitions, 696 flow. Second operand 5 states and 127 transitions. [2024-06-03 20:33:30,059 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 90 places, 120 transitions, 1094 flow [2024-06-03 20:33:30,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 85 places, 120 transitions, 1029 flow, removed 10 selfloop flow, removed 5 redundant places. [2024-06-03 20:33:30,078 INFO L231 Difference]: Finished difference. Result has 87 places, 102 transitions, 799 flow [2024-06-03 20:33:30,079 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} [2024-06-03 20:33:30,079 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 45 predicate places. [2024-06-03 20:33:30,079 INFO L495 AbstractCegarLoop]: Abstraction has has 87 places, 102 transitions, 799 flow [2024-06-03 20:33:30,079 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) [2024-06-03 20:33:30,079 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:30,079 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:30,080 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable15 [2024-06-03 20:33:30,080 INFO L420 AbstractCegarLoop]: === Iteration 17 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:30,080 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:30,080 INFO L85 PathProgramCache]: Analyzing trace with hash -156687912, now seen corresponding path program 4 times [2024-06-03 20:33:30,080 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:30,080 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1635305464] [2024-06-03 20:33:30,081 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:30,081 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:30,088 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:30,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:30,382 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:30,382 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1635305464] [2024-06-03 20:33:30,382 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1635305464] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:30,382 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:30,382 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:30,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2098889368] [2024-06-03 20:33:30,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:30,383 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:30,383 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:30,383 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:30,383 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:30,448 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:30,449 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) [2024-06-03 20:33:30,449 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:30,449 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:30,449 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:30,704 INFO L124 PetriNetUnfolderBase]: 1093/1792 cut-off events. [2024-06-03 20:33:30,704 INFO L125 PetriNetUnfolderBase]: For 18737/18737 co-relation queries the response was YES. [2024-06-03 20:33:30,710 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. [2024-06-03 20:33:30,716 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 89 selfloop transitions, 40 changer transitions 0/135 dead transitions. [2024-06-03 20:33:30,716 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 93 places, 135 transitions, 1149 flow [2024-06-03 20:33:30,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:30,717 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:30,717 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:33:30,717 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-03 20:33:30,717 INFO L175 Difference]: Start difference. First operand has 87 places, 102 transitions, 799 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:33:30,717 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 93 places, 135 transitions, 1149 flow [2024-06-03 20:33:30,737 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 93 places, 135 transitions, 1123 flow, removed 13 selfloop flow, removed 0 redundant places. [2024-06-03 20:33:30,739 INFO L231 Difference]: Finished difference. Result has 94 places, 102 transitions, 867 flow [2024-06-03 20:33:30,739 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} [2024-06-03 20:33:30,739 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 52 predicate places. [2024-06-03 20:33:30,739 INFO L495 AbstractCegarLoop]: Abstraction has has 94 places, 102 transitions, 867 flow [2024-06-03 20:33:30,740 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) [2024-06-03 20:33:30,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:30,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:30,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable16 [2024-06-03 20:33:30,740 INFO L420 AbstractCegarLoop]: === Iteration 18 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:30,740 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:30,741 INFO L85 PathProgramCache]: Analyzing trace with hash 73776520, now seen corresponding path program 1 times [2024-06-03 20:33:30,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:30,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11059120] [2024-06-03 20:33:30,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:30,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:30,748 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:31,010 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:31,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:31,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11059120] [2024-06-03 20:33:31,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11059120] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:31,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:31,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:31,011 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [268469366] [2024-06-03 20:33:31,011 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:31,011 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:31,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:31,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:31,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:31,058 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:31,058 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) [2024-06-03 20:33:31,059 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:31,059 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:31,059 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:31,268 INFO L124 PetriNetUnfolderBase]: 1110/1819 cut-off events. [2024-06-03 20:33:31,269 INFO L125 PetriNetUnfolderBase]: For 19149/19149 co-relation queries the response was YES. [2024-06-03 20:33:31,274 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. [2024-06-03 20:33:31,280 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 97 selfloop transitions, 20 changer transitions 0/123 dead transitions. [2024-06-03 20:33:31,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 98 places, 123 transitions, 1171 flow [2024-06-03 20:33:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 124 transitions. [2024-06-03 20:33:31,282 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6048780487804878 [2024-06-03 20:33:31,282 INFO L175 Difference]: Start difference. First operand has 94 places, 102 transitions, 867 flow. Second operand 5 states and 124 transitions. [2024-06-03 20:33:31,282 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 98 places, 123 transitions, 1171 flow [2024-06-03 20:33:31,298 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 92 places, 123 transitions, 1080 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:33:31,299 INFO L231 Difference]: Finished difference. Result has 93 places, 104 transitions, 849 flow [2024-06-03 20:33:31,300 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} [2024-06-03 20:33:31,300 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 51 predicate places. [2024-06-03 20:33:31,300 INFO L495 AbstractCegarLoop]: Abstraction has has 93 places, 104 transitions, 849 flow [2024-06-03 20:33:31,300 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) [2024-06-03 20:33:31,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:31,301 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:31,301 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable17 [2024-06-03 20:33:31,301 INFO L420 AbstractCegarLoop]: === Iteration 19 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:31,301 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:31,301 INFO L85 PathProgramCache]: Analyzing trace with hash 82347400, now seen corresponding path program 2 times [2024-06-03 20:33:31,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:31,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [605545646] [2024-06-03 20:33:31,302 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:31,302 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:31,308 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:31,561 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:31,562 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:31,562 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [605545646] [2024-06-03 20:33:31,562 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [605545646] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:31,562 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:31,562 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:31,562 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1829576099] [2024-06-03 20:33:31,562 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:31,562 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:31,563 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:31,563 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:31,563 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:31,601 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:31,601 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) [2024-06-03 20:33:31,601 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:31,601 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:31,601 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:31,831 INFO L124 PetriNetUnfolderBase]: 1102/1814 cut-off events. [2024-06-03 20:33:31,831 INFO L125 PetriNetUnfolderBase]: For 18747/18758 co-relation queries the response was YES. [2024-06-03 20:33:31,836 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. [2024-06-03 20:33:31,842 INFO L140 encePairwiseOnDemand]: 34/41 looper letters, 97 selfloop transitions, 20 changer transitions 0/123 dead transitions. [2024-06-03 20:33:31,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 97 places, 123 transitions, 1151 flow [2024-06-03 20:33:31,843 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:31,843 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:31,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-03 20:33:31,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:33:31,844 INFO L175 Difference]: Start difference. First operand has 93 places, 104 transitions, 849 flow. Second operand 5 states and 120 transitions. [2024-06-03 20:33:31,844 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 97 places, 123 transitions, 1151 flow [2024-06-03 20:33:31,860 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 94 places, 123 transitions, 1096 flow, removed 9 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:31,861 INFO L231 Difference]: Finished difference. Result has 95 places, 106 transitions, 871 flow [2024-06-03 20:33:31,862 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} [2024-06-03 20:33:31,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 53 predicate places. [2024-06-03 20:33:31,862 INFO L495 AbstractCegarLoop]: Abstraction has has 95 places, 106 transitions, 871 flow [2024-06-03 20:33:31,862 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) [2024-06-03 20:33:31,862 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:31,862 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:31,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable18 [2024-06-03 20:33:31,863 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)] === [2024-06-03 20:33:31,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:31,863 INFO L85 PathProgramCache]: Analyzing trace with hash 2053335980, now seen corresponding path program 2 times [2024-06-03 20:33:31,863 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:31,863 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [11225350] [2024-06-03 20:33:31,863 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:31,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:31,872 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:32,160 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:32,161 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:32,161 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [11225350] [2024-06-03 20:33:32,161 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [11225350] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:32,161 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:32,161 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [3] imperfect sequences [] total 3 [2024-06-03 20:33:32,161 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [339830993] [2024-06-03 20:33:32,161 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:32,162 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 5 states [2024-06-03 20:33:32,162 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:32,162 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 5 interpolants. [2024-06-03 20:33:32,162 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=8, Invalid=12, Unknown=0, NotChecked=0, Total=20 [2024-06-03 20:33:32,203 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:33:32,203 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) [2024-06-03 20:33:32,204 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:32,204 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:33:32,204 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:32,414 INFO L124 PetriNetUnfolderBase]: 1092/1814 cut-off events. [2024-06-03 20:33:32,415 INFO L125 PetriNetUnfolderBase]: For 21052/21052 co-relation queries the response was YES. [2024-06-03 20:33:32,420 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. [2024-06-03 20:33:32,427 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 93 selfloop transitions, 37 changer transitions 0/141 dead transitions. [2024-06-03 20:33:32,428 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 99 places, 141 transitions, 1340 flow [2024-06-03 20:33:32,428 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:32,428 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:32,428 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 131 transitions. [2024-06-03 20:33:32,429 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6390243902439025 [2024-06-03 20:33:32,429 INFO L175 Difference]: Start difference. First operand has 95 places, 106 transitions, 871 flow. Second operand 5 states and 131 transitions. [2024-06-03 20:33:32,429 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 99 places, 141 transitions, 1340 flow [2024-06-03 20:33:32,454 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 96 places, 141 transitions, 1281 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:32,456 INFO L231 Difference]: Finished difference. Result has 98 places, 121 transitions, 1076 flow [2024-06-03 20:33:32,456 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} [2024-06-03 20:33:32,456 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 56 predicate places. [2024-06-03 20:33:32,456 INFO L495 AbstractCegarLoop]: Abstraction has has 98 places, 121 transitions, 1076 flow [2024-06-03 20:33:32,456 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) [2024-06-03 20:33:32,457 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:32,457 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:32,457 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable19 [2024-06-03 20:33:32,457 INFO L420 AbstractCegarLoop]: === Iteration 21 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:32,457 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:32,457 INFO L85 PathProgramCache]: Analyzing trace with hash -128441090, now seen corresponding path program 1 times [2024-06-03 20:33:32,457 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:32,458 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [663780675] [2024-06-03 20:33:32,458 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:32,458 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:32,464 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:32,737 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:32,737 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:32,737 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [663780675] [2024-06-03 20:33:32,738 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [663780675] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:32,738 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:32,738 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:32,738 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1824932880] [2024-06-03 20:33:32,738 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:32,738 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:32,739 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:32,739 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:32,739 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:32,794 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:32,795 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) [2024-06-03 20:33:32,795 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:32,795 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:32,795 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:33,117 INFO L124 PetriNetUnfolderBase]: 1254/2068 cut-off events. [2024-06-03 20:33:33,122 INFO L125 PetriNetUnfolderBase]: For 28141/28152 co-relation queries the response was YES. [2024-06-03 20:33:33,129 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. [2024-06-03 20:33:33,137 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 113 selfloop transitions, 40 changer transitions 0/159 dead transitions. [2024-06-03 20:33:33,137 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 104 places, 159 transitions, 1592 flow [2024-06-03 20:33:33,138 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:33,138 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:33,138 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:33:33,138 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:33:33,138 INFO L175 Difference]: Start difference. First operand has 98 places, 121 transitions, 1076 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:33:33,139 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 104 places, 159 transitions, 1592 flow [2024-06-03 20:33:33,168 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 103 places, 159 transitions, 1570 flow, removed 7 selfloop flow, removed 1 redundant places. [2024-06-03 20:33:33,170 INFO L231 Difference]: Finished difference. Result has 104 places, 123 transitions, 1178 flow [2024-06-03 20:33:33,170 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} [2024-06-03 20:33:33,171 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 62 predicate places. [2024-06-03 20:33:33,171 INFO L495 AbstractCegarLoop]: Abstraction has has 104 places, 123 transitions, 1178 flow [2024-06-03 20:33:33,171 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) [2024-06-03 20:33:33,171 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:33,171 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:33,171 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable20 [2024-06-03 20:33:33,172 INFO L420 AbstractCegarLoop]: === Iteration 22 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:33,172 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:33,172 INFO L85 PathProgramCache]: Analyzing trace with hash 1902778724, now seen corresponding path program 2 times [2024-06-03 20:33:33,172 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:33,172 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [794382866] [2024-06-03 20:33:33,172 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:33,173 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:33,179 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:33,493 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:33,494 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:33,494 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [794382866] [2024-06-03 20:33:33,494 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [794382866] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:33,494 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:33,494 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:33:33,494 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [504043889] [2024-06-03 20:33:33,495 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:33,495 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:33:33,495 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:33,495 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:33:33,495 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:33:33,545 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:33,545 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) [2024-06-03 20:33:33,545 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:33,545 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:33,545 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:33,887 INFO L124 PetriNetUnfolderBase]: 1312/2169 cut-off events. [2024-06-03 20:33:33,887 INFO L125 PetriNetUnfolderBase]: For 31904/31904 co-relation queries the response was YES. [2024-06-03 20:33:33,895 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. [2024-06-03 20:33:33,903 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 118 selfloop transitions, 41 changer transitions 0/165 dead transitions. [2024-06-03 20:33:33,903 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 112 places, 165 transitions, 1630 flow [2024-06-03 20:33:33,904 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:33:33,904 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:33:33,905 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-03 20:33:33,906 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-03 20:33:33,906 INFO L175 Difference]: Start difference. First operand has 104 places, 123 transitions, 1178 flow. Second operand 9 states and 211 transitions. [2024-06-03 20:33:33,906 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 112 places, 165 transitions, 1630 flow [2024-06-03 20:33:33,944 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 165 transitions, 1580 flow, removed 6 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:33,945 INFO L231 Difference]: Finished difference. Result has 110 places, 124 transitions, 1239 flow [2024-06-03 20:33:33,946 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} [2024-06-03 20:33:33,946 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-03 20:33:33,946 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 124 transitions, 1239 flow [2024-06-03 20:33:33,946 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) [2024-06-03 20:33:33,946 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:33,947 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:33,947 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable21 [2024-06-03 20:33:33,947 INFO L420 AbstractCegarLoop]: === Iteration 23 === Targeting ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:33,947 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:33,947 INFO L85 PathProgramCache]: Analyzing trace with hash -1667743104, now seen corresponding path program 3 times [2024-06-03 20:33:33,947 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:33,947 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [759949557] [2024-06-03 20:33:33,948 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:33,948 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:33,955 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:34,227 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:34,228 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:34,228 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [759949557] [2024-06-03 20:33:34,228 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [759949557] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:34,228 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:34,228 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:34,228 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1435373565] [2024-06-03 20:33:34,228 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:34,229 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:34,229 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:34,229 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:34,229 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:34,267 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:34,268 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) [2024-06-03 20:33:34,268 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:34,268 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:34,268 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:34,566 INFO L124 PetriNetUnfolderBase]: 1353/2247 cut-off events. [2024-06-03 20:33:34,566 INFO L125 PetriNetUnfolderBase]: For 35457/35468 co-relation queries the response was YES. [2024-06-03 20:33:34,574 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. [2024-06-03 20:33:34,582 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 116 selfloop transitions, 36 changer transitions 0/158 dead transitions. [2024-06-03 20:33:34,582 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 116 places, 158 transitions, 1665 flow [2024-06-03 20:33:34,583 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:34,583 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:34,583 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 169 transitions. [2024-06-03 20:33:34,584 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5888501742160279 [2024-06-03 20:33:34,584 INFO L175 Difference]: Start difference. First operand has 110 places, 124 transitions, 1239 flow. Second operand 7 states and 169 transitions. [2024-06-03 20:33:34,584 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 116 places, 158 transitions, 1665 flow [2024-06-03 20:33:34,625 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 109 places, 158 transitions, 1576 flow, removed 5 selfloop flow, removed 7 redundant places. [2024-06-03 20:33:34,626 INFO L231 Difference]: Finished difference. Result has 110 places, 125 transitions, 1252 flow [2024-06-03 20:33:34,627 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} [2024-06-03 20:33:34,627 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 68 predicate places. [2024-06-03 20:33:34,627 INFO L495 AbstractCegarLoop]: Abstraction has has 110 places, 125 transitions, 1252 flow [2024-06-03 20:33:34,627 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) [2024-06-03 20:33:34,627 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:34,628 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:34,628 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable22 [2024-06-03 20:33:34,628 INFO L420 AbstractCegarLoop]: === Iteration 24 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:34,628 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:34,628 INFO L85 PathProgramCache]: Analyzing trace with hash -142192784, now seen corresponding path program 1 times [2024-06-03 20:33:34,628 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:34,628 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [121279912] [2024-06-03 20:33:34,628 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:34,629 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:34,636 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:34,926 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:34,926 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:34,926 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [121279912] [2024-06-03 20:33:34,926 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [121279912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:34,926 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:34,926 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:34,927 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [682736243] [2024-06-03 20:33:34,927 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:34,927 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:34,928 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:34,928 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:34,928 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:34,986 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:34,986 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) [2024-06-03 20:33:34,987 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:34,987 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:34,987 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:35,230 INFO L124 PetriNetUnfolderBase]: 1358/2270 cut-off events. [2024-06-03 20:33:35,230 INFO L125 PetriNetUnfolderBase]: For 35346/35346 co-relation queries the response was YES. [2024-06-03 20:33:35,238 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. [2024-06-03 20:33:35,247 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 134 selfloop transitions, 22 changer transitions 0/162 dead transitions. [2024-06-03 20:33:35,247 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 115 places, 162 transitions, 1752 flow [2024-06-03 20:33:35,247 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:35,247 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:35,248 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 142 transitions. [2024-06-03 20:33:35,248 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-03 20:33:35,248 INFO L175 Difference]: Start difference. First operand has 110 places, 125 transitions, 1252 flow. Second operand 6 states and 142 transitions. [2024-06-03 20:33:35,248 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 115 places, 162 transitions, 1752 flow [2024-06-03 20:33:35,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 110 places, 162 transitions, 1668 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:33:35,298 INFO L231 Difference]: Finished difference. Result has 113 places, 139 transitions, 1339 flow [2024-06-03 20:33:35,298 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} [2024-06-03 20:33:35,299 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 71 predicate places. [2024-06-03 20:33:35,299 INFO L495 AbstractCegarLoop]: Abstraction has has 113 places, 139 transitions, 1339 flow [2024-06-03 20:33:35,299 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) [2024-06-03 20:33:35,300 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:35,300 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:35,300 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable23 [2024-06-03 20:33:35,300 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)] === [2024-06-03 20:33:35,300 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:35,301 INFO L85 PathProgramCache]: Analyzing trace with hash 1911793416, now seen corresponding path program 4 times [2024-06-03 20:33:35,301 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:35,301 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1268917903] [2024-06-03 20:33:35,301 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:35,301 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:35,309 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:35,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:35,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:35,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1268917903] [2024-06-03 20:33:35,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1268917903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:35,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:35,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:35,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [528130331] [2024-06-03 20:33:35,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:35,592 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:35,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:35,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:35,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:35,631 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:35,631 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) [2024-06-03 20:33:35,631 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:35,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:35,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:35,959 INFO L124 PetriNetUnfolderBase]: 1416/2374 cut-off events. [2024-06-03 20:33:35,959 INFO L125 PetriNetUnfolderBase]: For 42266/42280 co-relation queries the response was YES. [2024-06-03 20:33:35,968 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. [2024-06-03 20:33:35,978 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 134 selfloop transitions, 34 changer transitions 0/174 dead transitions. [2024-06-03 20:33:35,978 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 120 places, 174 transitions, 1797 flow [2024-06-03 20:33:35,979 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:33:35,979 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:33:35,979 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 20:33:35,979 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-03 20:33:35,979 INFO L175 Difference]: Start difference. First operand has 113 places, 139 transitions, 1339 flow. Second operand 8 states and 187 transitions. [2024-06-03 20:33:35,980 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 120 places, 174 transitions, 1797 flow [2024-06-03 20:33:36,032 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 120 places, 174 transitions, 1777 flow, removed 10 selfloop flow, removed 0 redundant places. [2024-06-03 20:33:36,035 INFO L231 Difference]: Finished difference. Result has 121 places, 140 transitions, 1420 flow [2024-06-03 20:33:36,035 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} [2024-06-03 20:33:36,035 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 79 predicate places. [2024-06-03 20:33:36,035 INFO L495 AbstractCegarLoop]: Abstraction has has 121 places, 140 transitions, 1420 flow [2024-06-03 20:33:36,036 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) [2024-06-03 20:33:36,036 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:36,036 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:36,036 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable24 [2024-06-03 20:33:36,036 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)] === [2024-06-03 20:33:36,036 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:36,037 INFO L85 PathProgramCache]: Analyzing trace with hash 224251932, now seen corresponding path program 5 times [2024-06-03 20:33:36,037 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:36,037 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [584959396] [2024-06-03 20:33:36,037 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:36,037 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:36,043 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:36,327 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:36,328 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:36,328 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [584959396] [2024-06-03 20:33:36,328 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [584959396] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:36,328 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:36,328 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:33:36,328 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1809458125] [2024-06-03 20:33:36,328 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:36,329 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:33:36,329 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:36,330 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:33:36,330 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:33:36,381 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:36,382 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) [2024-06-03 20:33:36,383 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:36,383 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:36,383 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:36,769 INFO L124 PetriNetUnfolderBase]: 1449/2434 cut-off events. [2024-06-03 20:33:36,769 INFO L125 PetriNetUnfolderBase]: For 45498/45498 co-relation queries the response was YES. [2024-06-03 20:33:36,779 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. [2024-06-03 20:33:36,788 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 133 selfloop transitions, 35 changer transitions 0/174 dead transitions. [2024-06-03 20:33:36,789 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 174 transitions, 1878 flow [2024-06-03 20:33:36,789 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:36,789 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:36,790 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:33:36,790 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:33:36,790 INFO L175 Difference]: Start difference. First operand has 121 places, 140 transitions, 1420 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:33:36,790 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 174 transitions, 1878 flow [2024-06-03 20:33:36,848 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 121 places, 174 transitions, 1799 flow, removed 7 selfloop flow, removed 6 redundant places. [2024-06-03 20:33:36,861 INFO L231 Difference]: Finished difference. Result has 122 places, 141 transitions, 1446 flow [2024-06-03 20:33:36,862 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} [2024-06-03 20:33:36,862 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 80 predicate places. [2024-06-03 20:33:36,862 INFO L495 AbstractCegarLoop]: Abstraction has has 122 places, 141 transitions, 1446 flow [2024-06-03 20:33:36,863 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) [2024-06-03 20:33:36,863 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:36,863 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:36,863 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable25 [2024-06-03 20:33:36,863 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)] === [2024-06-03 20:33:36,863 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:36,863 INFO L85 PathProgramCache]: Analyzing trace with hash -760816356, now seen corresponding path program 6 times [2024-06-03 20:33:36,864 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:36,864 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [595785853] [2024-06-03 20:33:36,864 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:36,864 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:36,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:37,141 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:37,142 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:37,142 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [595785853] [2024-06-03 20:33:37,142 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [595785853] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:37,142 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:37,142 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:37,142 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2000273606] [2024-06-03 20:33:37,142 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:37,145 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:37,146 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:37,147 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:37,147 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:37,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:37,197 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) [2024-06-03 20:33:37,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:37,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:37,198 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:37,542 INFO L124 PetriNetUnfolderBase]: 1429/2409 cut-off events. [2024-06-03 20:33:37,543 INFO L125 PetriNetUnfolderBase]: For 44556/44567 co-relation queries the response was YES. [2024-06-03 20:33:37,552 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. [2024-06-03 20:33:37,562 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 128 selfloop transitions, 36 changer transitions 0/170 dead transitions. [2024-06-03 20:33:37,562 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 127 places, 170 transitions, 1866 flow [2024-06-03 20:33:37,562 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:37,563 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:37,563 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 149 transitions. [2024-06-03 20:33:37,563 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6056910569105691 [2024-06-03 20:33:37,564 INFO L175 Difference]: Start difference. First operand has 122 places, 141 transitions, 1446 flow. Second operand 6 states and 149 transitions. [2024-06-03 20:33:37,564 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 127 places, 170 transitions, 1866 flow [2024-06-03 20:33:37,636 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 122 places, 170 transitions, 1777 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:33:37,638 INFO L231 Difference]: Finished difference. Result has 123 places, 141 transitions, 1436 flow [2024-06-03 20:33:37,638 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} [2024-06-03 20:33:37,639 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 81 predicate places. [2024-06-03 20:33:37,639 INFO L495 AbstractCegarLoop]: Abstraction has has 123 places, 141 transitions, 1436 flow [2024-06-03 20:33:37,639 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) [2024-06-03 20:33:37,639 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:37,639 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:37,639 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable26 [2024-06-03 20:33:37,639 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)] === [2024-06-03 20:33:37,640 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:37,640 INFO L85 PathProgramCache]: Analyzing trace with hash 229829514, now seen corresponding path program 1 times [2024-06-03 20:33:37,640 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:37,640 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1336882079] [2024-06-03 20:33:37,640 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:37,640 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:37,647 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:37,929 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:37,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:37,930 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1336882079] [2024-06-03 20:33:37,930 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1336882079] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:37,930 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:37,930 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:33:37,930 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1512709309] [2024-06-03 20:33:37,930 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:37,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:33:37,931 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:37,931 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:33:37,931 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:33:38,038 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:38,038 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) [2024-06-03 20:33:38,038 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:38,038 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:38,039 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:38,438 INFO L124 PetriNetUnfolderBase]: 1470/2487 cut-off events. [2024-06-03 20:33:38,438 INFO L125 PetriNetUnfolderBase]: For 46182/46185 co-relation queries the response was YES. [2024-06-03 20:33:38,447 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. [2024-06-03 20:33:38,456 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 139 selfloop transitions, 41 changer transitions 0/186 dead transitions. [2024-06-03 20:33:38,456 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 186 transitions, 1944 flow [2024-06-03 20:33:38,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:33:38,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:33:38,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-03 20:33:38,457 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-03 20:33:38,457 INFO L175 Difference]: Start difference. First operand has 123 places, 141 transitions, 1436 flow. Second operand 9 states and 213 transitions. [2024-06-03 20:33:38,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 186 transitions, 1944 flow [2024-06-03 20:33:38,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 126 places, 186 transitions, 1840 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:33:38,513 INFO L231 Difference]: Finished difference. Result has 127 places, 142 transitions, 1442 flow [2024-06-03 20:33:38,513 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} [2024-06-03 20:33:38,513 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 85 predicate places. [2024-06-03 20:33:38,513 INFO L495 AbstractCegarLoop]: Abstraction has has 127 places, 142 transitions, 1442 flow [2024-06-03 20:33:38,514 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) [2024-06-03 20:33:38,514 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:38,514 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:38,514 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable27 [2024-06-03 20:33:38,514 INFO L420 AbstractCegarLoop]: === Iteration 29 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:38,514 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:38,514 INFO L85 PathProgramCache]: Analyzing trace with hash 1454240436, now seen corresponding path program 2 times [2024-06-03 20:33:38,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:38,515 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [539609171] [2024-06-03 20:33:38,515 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:38,515 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:38,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:38,804 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:38,805 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:38,805 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [539609171] [2024-06-03 20:33:38,805 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [539609171] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:38,805 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:38,805 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:38,805 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [291387890] [2024-06-03 20:33:38,805 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:38,805 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:38,806 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:38,806 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:38,806 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:38,842 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:38,843 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) [2024-06-03 20:33:38,843 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:38,843 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:38,843 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:39,158 INFO L124 PetriNetUnfolderBase]: 1475/2495 cut-off events. [2024-06-03 20:33:39,158 INFO L125 PetriNetUnfolderBase]: For 45197/45197 co-relation queries the response was YES. [2024-06-03 20:33:39,168 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. [2024-06-03 20:33:39,176 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 132 selfloop transitions, 25 changer transitions 0/163 dead transitions. [2024-06-03 20:33:39,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 132 places, 163 transitions, 1877 flow [2024-06-03 20:33:39,177 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:39,177 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:39,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 137 transitions. [2024-06-03 20:33:39,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.556910569105691 [2024-06-03 20:33:39,177 INFO L175 Difference]: Start difference. First operand has 127 places, 142 transitions, 1442 flow. Second operand 6 states and 137 transitions. [2024-06-03 20:33:39,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 132 places, 163 transitions, 1877 flow [2024-06-03 20:33:39,226 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 125 places, 163 transitions, 1783 flow, removed 7 selfloop flow, removed 7 redundant places. [2024-06-03 20:33:39,228 INFO L231 Difference]: Finished difference. Result has 126 places, 146 transitions, 1431 flow [2024-06-03 20:33:39,228 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} [2024-06-03 20:33:39,229 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 84 predicate places. [2024-06-03 20:33:39,229 INFO L495 AbstractCegarLoop]: Abstraction has has 126 places, 146 transitions, 1431 flow [2024-06-03 20:33:39,229 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) [2024-06-03 20:33:39,229 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:39,229 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:39,229 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable28 [2024-06-03 20:33:39,229 INFO L420 AbstractCegarLoop]: === Iteration 30 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:39,230 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:39,230 INFO L85 PathProgramCache]: Analyzing trace with hash 1454240808, now seen corresponding path program 1 times [2024-06-03 20:33:39,230 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:39,230 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [79443647] [2024-06-03 20:33:39,230 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:39,230 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:39,254 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:39,590 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:39,591 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:39,591 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [79443647] [2024-06-03 20:33:39,591 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [79443647] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:39,591 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:39,591 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:39,591 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [21102429] [2024-06-03 20:33:39,591 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:39,591 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:39,592 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:39,592 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:39,592 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:39,628 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:33:39,629 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) [2024-06-03 20:33:39,629 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:39,629 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:33:39,629 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:39,977 INFO L124 PetriNetUnfolderBase]: 1446/2461 cut-off events. [2024-06-03 20:33:39,977 INFO L125 PetriNetUnfolderBase]: For 48630/48630 co-relation queries the response was YES. [2024-06-03 20:33:39,988 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. [2024-06-03 20:33:39,998 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 102 selfloop transitions, 57 changer transitions 0/176 dead transitions. [2024-06-03 20:33:39,998 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 131 places, 176 transitions, 2029 flow [2024-06-03 20:33:39,998 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:39,998 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:39,999 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 148 transitions. [2024-06-03 20:33:39,999 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6016260162601627 [2024-06-03 20:33:39,999 INFO L175 Difference]: Start difference. First operand has 126 places, 146 transitions, 1431 flow. Second operand 6 states and 148 transitions. [2024-06-03 20:33:39,999 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 131 places, 176 transitions, 2029 flow [2024-06-03 20:33:40,069 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 129 places, 176 transitions, 1993 flow, removed 5 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:40,072 INFO L231 Difference]: Finished difference. Result has 131 places, 158 transitions, 1686 flow [2024-06-03 20:33:40,073 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} [2024-06-03 20:33:40,073 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 89 predicate places. [2024-06-03 20:33:40,073 INFO L495 AbstractCegarLoop]: Abstraction has has 131 places, 158 transitions, 1686 flow [2024-06-03 20:33:40,073 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:40,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:40,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:40,074 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable29 [2024-06-03 20:33:40,074 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)] === [2024-06-03 20:33:40,074 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:40,074 INFO L85 PathProgramCache]: Analyzing trace with hash 463477148, now seen corresponding path program 2 times [2024-06-03 20:33:40,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:40,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1469902584] [2024-06-03 20:33:40,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:40,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:40,082 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:40,365 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:40,365 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:40,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1469902584] [2024-06-03 20:33:40,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1469902584] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:40,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:40,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:40,366 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551663167] [2024-06-03 20:33:40,366 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:40,366 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:40,366 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:40,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:40,367 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:40,436 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:40,436 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) [2024-06-03 20:33:40,436 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:40,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:40,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:40,798 INFO L124 PetriNetUnfolderBase]: 1539/2611 cut-off events. [2024-06-03 20:33:40,798 INFO L125 PetriNetUnfolderBase]: For 56536/56536 co-relation queries the response was YES. [2024-06-03 20:33:40,809 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. [2024-06-03 20:33:40,818 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 150 selfloop transitions, 43 changer transitions 0/199 dead transitions. [2024-06-03 20:33:40,819 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 138 places, 199 transitions, 2214 flow [2024-06-03 20:33:40,819 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:33:40,819 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:33:40,820 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 20:33:40,820 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-03 20:33:40,820 INFO L175 Difference]: Start difference. First operand has 131 places, 158 transitions, 1686 flow. Second operand 8 states and 195 transitions. [2024-06-03 20:33:40,820 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 138 places, 199 transitions, 2214 flow [2024-06-03 20:33:40,887 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 199 transitions, 2157 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-03 20:33:40,889 INFO L231 Difference]: Finished difference. Result has 138 places, 159 transitions, 1747 flow [2024-06-03 20:33:40,890 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} [2024-06-03 20:33:40,890 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-03 20:33:40,890 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 159 transitions, 1747 flow [2024-06-03 20:33:40,890 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) [2024-06-03 20:33:40,891 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:40,891 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:40,891 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable30 [2024-06-03 20:33:40,891 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)] === [2024-06-03 20:33:40,891 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:40,891 INFO L85 PathProgramCache]: Analyzing trace with hash -1742196820, now seen corresponding path program 3 times [2024-06-03 20:33:40,891 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:40,892 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1752895747] [2024-06-03 20:33:40,892 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:40,892 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:40,898 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:41,168 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:41,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:41,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1752895747] [2024-06-03 20:33:41,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1752895747] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:41,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:41,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:41,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1146383434] [2024-06-03 20:33:41,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:41,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:41,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:41,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:41,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:41,238 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:41,239 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) [2024-06-03 20:33:41,239 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:41,239 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:41,239 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:41,566 INFO L124 PetriNetUnfolderBase]: 1519/2586 cut-off events. [2024-06-03 20:33:41,566 INFO L125 PetriNetUnfolderBase]: For 56167/56178 co-relation queries the response was YES. [2024-06-03 20:33:41,577 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. [2024-06-03 20:33:41,585 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 144 selfloop transitions, 42 changer transitions 0/192 dead transitions. [2024-06-03 20:33:41,586 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 192 transitions, 2171 flow [2024-06-03 20:33:41,586 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:41,586 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:41,586 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 170 transitions. [2024-06-03 20:33:41,586 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5923344947735192 [2024-06-03 20:33:41,587 INFO L175 Difference]: Start difference. First operand has 138 places, 159 transitions, 1747 flow. Second operand 7 states and 170 transitions. [2024-06-03 20:33:41,587 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 192 transitions, 2171 flow [2024-06-03 20:33:41,663 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 137 places, 192 transitions, 2065 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 20:33:41,665 INFO L231 Difference]: Finished difference. Result has 138 places, 158 transitions, 1679 flow [2024-06-03 20:33:41,665 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} [2024-06-03 20:33:41,666 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-03 20:33:41,666 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 158 transitions, 1679 flow [2024-06-03 20:33:41,666 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) [2024-06-03 20:33:41,666 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:41,666 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:41,666 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable31 [2024-06-03 20:33:41,666 INFO L420 AbstractCegarLoop]: === Iteration 33 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:41,667 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:41,667 INFO L85 PathProgramCache]: Analyzing trace with hash 1808503848, now seen corresponding path program 2 times [2024-06-03 20:33:41,667 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:41,667 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [31127568] [2024-06-03 20:33:41,667 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:41,667 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:41,674 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:41,959 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:41,959 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:41,959 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [31127568] [2024-06-03 20:33:41,959 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [31127568] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:41,959 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:41,959 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:41,960 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1204946724] [2024-06-03 20:33:41,972 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:41,972 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:41,973 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:41,973 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:41,973 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:42,025 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:33:42,025 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) [2024-06-03 20:33:42,025 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:42,025 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:33:42,025 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:42,320 INFO L124 PetriNetUnfolderBase]: 1492/2561 cut-off events. [2024-06-03 20:33:42,321 INFO L125 PetriNetUnfolderBase]: For 52455/52455 co-relation queries the response was YES. [2024-06-03 20:33:42,333 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. [2024-06-03 20:33:42,342 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 123 selfloop transitions, 50 changer transitions 0/190 dead transitions. [2024-06-03 20:33:42,342 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 143 places, 190 transitions, 2326 flow [2024-06-03 20:33:42,343 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:42,343 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:42,343 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 20:33:42,343 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:33:42,343 INFO L175 Difference]: Start difference. First operand has 138 places, 158 transitions, 1679 flow. Second operand 6 states and 150 transitions. [2024-06-03 20:33:42,343 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 143 places, 190 transitions, 2326 flow [2024-06-03 20:33:42,422 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 136 places, 190 transitions, 2183 flow, removed 11 selfloop flow, removed 7 redundant places. [2024-06-03 20:33:42,424 INFO L231 Difference]: Finished difference. Result has 138 places, 168 transitions, 1804 flow [2024-06-03 20:33:42,425 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} [2024-06-03 20:33:42,425 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 96 predicate places. [2024-06-03 20:33:42,425 INFO L495 AbstractCegarLoop]: Abstraction has has 138 places, 168 transitions, 1804 flow [2024-06-03 20:33:42,425 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:42,425 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:42,425 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:42,426 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable32 [2024-06-03 20:33:42,426 INFO L420 AbstractCegarLoop]: === Iteration 34 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:42,426 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:42,426 INFO L85 PathProgramCache]: Analyzing trace with hash -124926554, now seen corresponding path program 3 times [2024-06-03 20:33:42,426 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:42,426 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [808536056] [2024-06-03 20:33:42,426 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:42,427 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:42,434 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:42,722 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:42,722 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:42,722 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [808536056] [2024-06-03 20:33:42,722 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [808536056] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:42,722 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:42,722 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:42,723 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2010418139] [2024-06-03 20:33:42,723 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:42,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:42,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:42,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:42,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:42,759 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:42,759 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) [2024-06-03 20:33:42,760 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:42,760 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:42,760 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:43,113 INFO L124 PetriNetUnfolderBase]: 1546/2629 cut-off events. [2024-06-03 20:33:43,113 INFO L125 PetriNetUnfolderBase]: For 53705/53705 co-relation queries the response was YES. [2024-06-03 20:33:43,123 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. [2024-06-03 20:33:43,131 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 166 selfloop transitions, 26 changer transitions 0/198 dead transitions. [2024-06-03 20:33:43,131 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 142 places, 198 transitions, 2319 flow [2024-06-03 20:33:43,132 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:43,132 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:43,132 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 126 transitions. [2024-06-03 20:33:43,132 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6146341463414634 [2024-06-03 20:33:43,132 INFO L175 Difference]: Start difference. First operand has 138 places, 168 transitions, 1804 flow. Second operand 5 states and 126 transitions. [2024-06-03 20:33:43,132 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 142 places, 198 transitions, 2319 flow [2024-06-03 20:33:43,204 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 141 places, 198 transitions, 2272 flow, removed 18 selfloop flow, removed 1 redundant places. [2024-06-03 20:33:43,206 INFO L231 Difference]: Finished difference. Result has 144 places, 177 transitions, 1934 flow [2024-06-03 20:33:43,207 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} [2024-06-03 20:33:43,207 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 102 predicate places. [2024-06-03 20:33:43,207 INFO L495 AbstractCegarLoop]: Abstraction has has 144 places, 177 transitions, 1934 flow [2024-06-03 20:33:43,207 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) [2024-06-03 20:33:43,207 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:43,207 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:43,208 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable33 [2024-06-03 20:33:43,208 INFO L420 AbstractCegarLoop]: === Iteration 35 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:43,208 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:43,208 INFO L85 PathProgramCache]: Analyzing trace with hash 2123651450, now seen corresponding path program 1 times [2024-06-03 20:33:43,208 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:43,208 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1617377649] [2024-06-03 20:33:43,208 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:43,208 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:43,215 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:43,491 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:43,491 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:43,491 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1617377649] [2024-06-03 20:33:43,492 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1617377649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:43,492 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:43,492 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:43,492 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [517727522] [2024-06-03 20:33:43,492 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:43,493 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:43,493 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:43,493 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:43,493 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=15, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:43,535 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:43,536 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) [2024-06-03 20:33:43,536 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:43,536 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:43,536 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:43,826 INFO L124 PetriNetUnfolderBase]: 1548/2644 cut-off events. [2024-06-03 20:33:43,826 INFO L125 PetriNetUnfolderBase]: For 57788/57802 co-relation queries the response was YES. [2024-06-03 20:33:43,839 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. [2024-06-03 20:33:43,848 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 149 selfloop transitions, 41 changer transitions 0/196 dead transitions. [2024-06-03 20:33:43,849 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 148 places, 196 transitions, 2528 flow [2024-06-03 20:33:43,849 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:43,849 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:43,849 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 120 transitions. [2024-06-03 20:33:43,850 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:33:43,850 INFO L175 Difference]: Start difference. First operand has 144 places, 177 transitions, 1934 flow. Second operand 5 states and 120 transitions. [2024-06-03 20:33:43,850 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 148 places, 196 transitions, 2528 flow [2024-06-03 20:33:43,954 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 148 places, 196 transitions, 2518 flow, removed 5 selfloop flow, removed 0 redundant places. [2024-06-03 20:33:43,957 INFO L231 Difference]: Finished difference. Result has 150 places, 182 transitions, 2100 flow [2024-06-03 20:33:43,957 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} [2024-06-03 20:33:43,958 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 108 predicate places. [2024-06-03 20:33:43,958 INFO L495 AbstractCegarLoop]: Abstraction has has 150 places, 182 transitions, 2100 flow [2024-06-03 20:33:43,958 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) [2024-06-03 20:33:43,958 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:43,958 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:43,958 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable34 [2024-06-03 20:33:43,958 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)] === [2024-06-03 20:33:43,959 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:43,959 INFO L85 PathProgramCache]: Analyzing trace with hash -1449518836, now seen corresponding path program 2 times [2024-06-03 20:33:43,959 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:43,959 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [999246791] [2024-06-03 20:33:43,959 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:43,959 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:43,966 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:44,302 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:44,302 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:44,302 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [999246791] [2024-06-03 20:33:44,302 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [999246791] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:44,302 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:44,302 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:44,302 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [731376049] [2024-06-03 20:33:44,302 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:44,303 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:44,303 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:44,303 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:44,303 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=11, Invalid=19, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:44,354 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:44,355 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) [2024-06-03 20:33:44,355 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:44,355 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:44,355 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:44,703 INFO L124 PetriNetUnfolderBase]: 1530/2612 cut-off events. [2024-06-03 20:33:44,703 INFO L125 PetriNetUnfolderBase]: For 58875/58878 co-relation queries the response was YES. [2024-06-03 20:33:44,717 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. [2024-06-03 20:33:44,727 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 149 selfloop transitions, 45 changer transitions 0/200 dead transitions. [2024-06-03 20:33:44,727 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 154 places, 200 transitions, 2534 flow [2024-06-03 20:33:44,727 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 5 states. [2024-06-03 20:33:44,727 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 5 states. [2024-06-03 20:33:44,728 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 5 states to 5 states and 127 transitions. [2024-06-03 20:33:44,728 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6195121951219512 [2024-06-03 20:33:44,728 INFO L175 Difference]: Start difference. First operand has 150 places, 182 transitions, 2100 flow. Second operand 5 states and 127 transitions. [2024-06-03 20:33:44,728 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 154 places, 200 transitions, 2534 flow [2024-06-03 20:33:44,828 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 200 transitions, 2455 flow, removed 24 selfloop flow, removed 1 redundant places. [2024-06-03 20:33:44,831 INFO L231 Difference]: Finished difference. Result has 154 places, 182 transitions, 2132 flow [2024-06-03 20:33:44,831 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} [2024-06-03 20:33:44,831 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-03 20:33:44,831 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 182 transitions, 2132 flow [2024-06-03 20:33:44,832 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) [2024-06-03 20:33:44,832 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:44,832 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:44,832 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable35 [2024-06-03 20:33:44,832 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)] === [2024-06-03 20:33:44,832 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:44,832 INFO L85 PathProgramCache]: Analyzing trace with hash -133432892, now seen corresponding path program 1 times [2024-06-03 20:33:44,833 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:44,833 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [158722226] [2024-06-03 20:33:44,833 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:44,833 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:44,840 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:45,157 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:45,157 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:45,157 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [158722226] [2024-06-03 20:33:45,157 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [158722226] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:45,157 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:45,157 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [4] imperfect sequences [] total 4 [2024-06-03 20:33:45,158 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [342845078] [2024-06-03 20:33:45,158 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:45,158 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 6 states [2024-06-03 20:33:45,158 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:45,158 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 6 interpolants. [2024-06-03 20:33:45,158 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=12, Invalid=18, Unknown=0, NotChecked=0, Total=30 [2024-06-03 20:33:45,193 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:33:45,193 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) [2024-06-03 20:33:45,193 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:45,193 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:33:45,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:45,484 INFO L124 PetriNetUnfolderBase]: 1472/2517 cut-off events. [2024-06-03 20:33:45,484 INFO L125 PetriNetUnfolderBase]: For 60456/60456 co-relation queries the response was YES. [2024-06-03 20:33:45,498 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. [2024-06-03 20:33:45,507 INFO L140 encePairwiseOnDemand]: 36/41 looper letters, 159 selfloop transitions, 14 changer transitions 0/193 dead transitions. [2024-06-03 20:33:45,507 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 157 places, 193 transitions, 2522 flow [2024-06-03 20:33:45,507 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 4 states. [2024-06-03 20:33:45,508 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 4 states. [2024-06-03 20:33:45,508 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 4 states to 4 states and 96 transitions. [2024-06-03 20:33:45,508 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:33:45,508 INFO L175 Difference]: Start difference. First operand has 154 places, 182 transitions, 2132 flow. Second operand 4 states and 96 transitions. [2024-06-03 20:33:45,508 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 157 places, 193 transitions, 2522 flow [2024-06-03 20:33:45,586 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 153 places, 193 transitions, 2453 flow, removed 1 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:45,589 INFO L231 Difference]: Finished difference. Result has 154 places, 184 transitions, 2123 flow [2024-06-03 20:33:45,589 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} [2024-06-03 20:33:45,589 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 112 predicate places. [2024-06-03 20:33:45,590 INFO L495 AbstractCegarLoop]: Abstraction has has 154 places, 184 transitions, 2123 flow [2024-06-03 20:33:45,590 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 6 states, 6 states have (on average 16.5) internal successors, (99), 6 states have internal predecessors, (99), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:33:45,590 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:45,590 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:45,590 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable36 [2024-06-03 20:33:45,590 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)] === [2024-06-03 20:33:45,591 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:45,591 INFO L85 PathProgramCache]: Analyzing trace with hash -2147097898, now seen corresponding path program 1 times [2024-06-03 20:33:45,591 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:45,591 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [448873367] [2024-06-03 20:33:45,591 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:45,591 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:45,598 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:45,912 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:45,913 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:45,913 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [448873367] [2024-06-03 20:33:45,913 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [448873367] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:45,913 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:45,913 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:45,913 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [698362336] [2024-06-03 20:33:45,914 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:45,915 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:45,915 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:45,915 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:45,916 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:45,957 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:45,958 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) [2024-06-03 20:33:45,958 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:45,958 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:45,958 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:46,293 INFO L124 PetriNetUnfolderBase]: 1525/2587 cut-off events. [2024-06-03 20:33:46,294 INFO L125 PetriNetUnfolderBase]: For 58557/58557 co-relation queries the response was YES. [2024-06-03 20:33:46,306 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. [2024-06-03 20:33:46,314 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 172 selfloop transitions, 41 changer transitions 0/219 dead transitions. [2024-06-03 20:33:46,315 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 160 places, 219 transitions, 2759 flow [2024-06-03 20:33:46,315 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:46,315 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:46,316 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 20:33:46,316 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:33:46,316 INFO L175 Difference]: Start difference. First operand has 154 places, 184 transitions, 2123 flow. Second operand 7 states and 161 transitions. [2024-06-03 20:33:46,316 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 160 places, 219 transitions, 2759 flow [2024-06-03 20:33:46,419 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 158 places, 219 transitions, 2717 flow, removed 9 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:46,422 INFO L231 Difference]: Finished difference. Result has 160 places, 195 transitions, 2284 flow [2024-06-03 20:33:46,422 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} [2024-06-03 20:33:46,422 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 118 predicate places. [2024-06-03 20:33:46,422 INFO L495 AbstractCegarLoop]: Abstraction has has 160 places, 195 transitions, 2284 flow [2024-06-03 20:33:46,422 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) [2024-06-03 20:33:46,422 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:46,423 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:46,423 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable37 [2024-06-03 20:33:46,423 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)] === [2024-06-03 20:33:46,423 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:46,423 INFO L85 PathProgramCache]: Analyzing trace with hash -2137832308, now seen corresponding path program 2 times [2024-06-03 20:33:46,423 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:46,423 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [62551387] [2024-06-03 20:33:46,424 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:46,424 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:46,430 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:46,730 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:46,730 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:46,730 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [62551387] [2024-06-03 20:33:46,730 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [62551387] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:46,730 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:46,730 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:46,730 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097754832] [2024-06-03 20:33:46,731 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:46,731 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:46,731 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:46,731 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:46,731 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:46,790 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:46,790 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) [2024-06-03 20:33:46,790 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:46,790 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:46,790 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:47,156 INFO L124 PetriNetUnfolderBase]: 1538/2609 cut-off events. [2024-06-03 20:33:47,156 INFO L125 PetriNetUnfolderBase]: For 63158/63158 co-relation queries the response was YES. [2024-06-03 20:33:47,168 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. [2024-06-03 20:33:47,176 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 169 selfloop transitions, 46 changer transitions 0/221 dead transitions. [2024-06-03 20:33:47,176 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 166 places, 221 transitions, 2971 flow [2024-06-03 20:33:47,176 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:47,176 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:47,177 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 20:33:47,177 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-03 20:33:47,177 INFO L175 Difference]: Start difference. First operand has 160 places, 195 transitions, 2284 flow. Second operand 7 states and 157 transitions. [2024-06-03 20:33:47,177 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 166 places, 221 transitions, 2971 flow [2024-06-03 20:33:47,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 164 places, 221 transitions, 2927 flow, removed 16 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:47,258 INFO L231 Difference]: Finished difference. Result has 165 places, 202 transitions, 2413 flow [2024-06-03 20:33:47,258 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} [2024-06-03 20:33:47,259 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 123 predicate places. [2024-06-03 20:33:47,259 INFO L495 AbstractCegarLoop]: Abstraction has has 165 places, 202 transitions, 2413 flow [2024-06-03 20:33:47,260 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) [2024-06-03 20:33:47,260 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:47,260 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:47,260 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable38 [2024-06-03 20:33:47,260 INFO L420 AbstractCegarLoop]: === Iteration 40 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:47,260 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:47,260 INFO L85 PathProgramCache]: Analyzing trace with hash 2131781644, now seen corresponding path program 3 times [2024-06-03 20:33:47,261 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:47,261 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2131417308] [2024-06-03 20:33:47,261 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:47,261 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:47,268 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:47,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:47,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:47,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2131417308] [2024-06-03 20:33:47,572 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2131417308] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:47,572 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:47,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:47,573 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [156424279] [2024-06-03 20:33:47,573 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:47,573 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:47,573 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:47,573 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:47,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:47,621 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:47,621 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) [2024-06-03 20:33:47,621 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:47,621 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:47,621 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:47,955 INFO L124 PetriNetUnfolderBase]: 1535/2605 cut-off events. [2024-06-03 20:33:47,955 INFO L125 PetriNetUnfolderBase]: For 65846/65846 co-relation queries the response was YES. [2024-06-03 20:33:47,968 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. [2024-06-03 20:33:47,977 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 169 selfloop transitions, 45 changer transitions 0/220 dead transitions. [2024-06-03 20:33:47,977 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 171 places, 220 transitions, 2955 flow [2024-06-03 20:33:47,978 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:47,978 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:47,978 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 20:33:47,978 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-03 20:33:47,978 INFO L175 Difference]: Start difference. First operand has 165 places, 202 transitions, 2413 flow. Second operand 7 states and 157 transitions. [2024-06-03 20:33:47,978 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 171 places, 220 transitions, 2955 flow [2024-06-03 20:33:48,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 168 places, 220 transitions, 2860 flow, removed 20 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:48,080 INFO L231 Difference]: Finished difference. Result has 169 places, 202 transitions, 2414 flow [2024-06-03 20:33:48,080 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} [2024-06-03 20:33:48,082 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 127 predicate places. [2024-06-03 20:33:48,082 INFO L495 AbstractCegarLoop]: Abstraction has has 169 places, 202 transitions, 2414 flow [2024-06-03 20:33:48,082 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) [2024-06-03 20:33:48,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:48,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:48,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable39 [2024-06-03 20:33:48,082 INFO L420 AbstractCegarLoop]: === Iteration 41 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:48,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:48,083 INFO L85 PathProgramCache]: Analyzing trace with hash 530254348, now seen corresponding path program 4 times [2024-06-03 20:33:48,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:48,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [610838995] [2024-06-03 20:33:48,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:48,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:48,092 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:48,433 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:48,434 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:48,434 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [610838995] [2024-06-03 20:33:48,434 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [610838995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:48,434 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:48,434 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:48,434 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1733664414] [2024-06-03 20:33:48,434 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:48,434 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:48,435 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:48,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:48,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:48,467 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:48,468 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) [2024-06-03 20:33:48,468 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:48,468 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:48,468 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:48,849 INFO L124 PetriNetUnfolderBase]: 1540/2614 cut-off events. [2024-06-03 20:33:48,849 INFO L125 PetriNetUnfolderBase]: For 69319/69319 co-relation queries the response was YES. [2024-06-03 20:33:48,864 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. [2024-06-03 20:33:48,872 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 184 selfloop transitions, 32 changer transitions 0/222 dead transitions. [2024-06-03 20:33:48,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 174 places, 222 transitions, 2999 flow [2024-06-03 20:33:48,873 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:48,873 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:48,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 138 transitions. [2024-06-03 20:33:48,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:33:48,874 INFO L175 Difference]: Start difference. First operand has 169 places, 202 transitions, 2414 flow. Second operand 6 states and 138 transitions. [2024-06-03 20:33:48,874 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 174 places, 222 transitions, 2999 flow [2024-06-03 20:33:48,996 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 170 places, 222 transitions, 2919 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:48,999 INFO L231 Difference]: Finished difference. Result has 171 places, 205 transitions, 2443 flow [2024-06-03 20:33:49,000 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} [2024-06-03 20:33:49,000 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 129 predicate places. [2024-06-03 20:33:49,000 INFO L495 AbstractCegarLoop]: Abstraction has has 171 places, 205 transitions, 2443 flow [2024-06-03 20:33:49,000 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) [2024-06-03 20:33:49,000 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:49,000 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:49,001 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable40 [2024-06-03 20:33:49,001 INFO L420 AbstractCegarLoop]: === Iteration 42 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:49,001 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:49,001 INFO L85 PathProgramCache]: Analyzing trace with hash 145188910, now seen corresponding path program 5 times [2024-06-03 20:33:49,001 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:49,001 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1291718607] [2024-06-03 20:33:49,001 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:49,002 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:49,008 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:49,306 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:49,306 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:49,307 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1291718607] [2024-06-03 20:33:49,307 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1291718607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:49,307 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:49,307 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:49,307 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1226240954] [2024-06-03 20:33:49,307 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:49,307 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:49,308 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:49,308 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:49,308 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:49,346 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:49,346 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) [2024-06-03 20:33:49,346 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:49,346 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:49,347 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:49,732 INFO L124 PetriNetUnfolderBase]: 1537/2610 cut-off events. [2024-06-03 20:33:49,733 INFO L125 PetriNetUnfolderBase]: For 71901/71901 co-relation queries the response was YES. [2024-06-03 20:33:49,746 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. [2024-06-03 20:33:49,753 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 187 selfloop transitions, 34 changer transitions 0/227 dead transitions. [2024-06-03 20:33:49,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 176 places, 227 transitions, 2941 flow [2024-06-03 20:33:49,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:49,754 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:49,755 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 143 transitions. [2024-06-03 20:33:49,755 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5813008130081301 [2024-06-03 20:33:49,755 INFO L175 Difference]: Start difference. First operand has 171 places, 205 transitions, 2443 flow. Second operand 6 states and 143 transitions. [2024-06-03 20:33:49,755 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 176 places, 227 transitions, 2941 flow [2024-06-03 20:33:49,878 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 171 places, 227 transitions, 2805 flow, removed 20 selfloop flow, removed 5 redundant places. [2024-06-03 20:33:49,881 INFO L231 Difference]: Finished difference. Result has 172 places, 205 transitions, 2381 flow [2024-06-03 20:33:49,881 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} [2024-06-03 20:33:49,881 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 130 predicate places. [2024-06-03 20:33:49,881 INFO L495 AbstractCegarLoop]: Abstraction has has 172 places, 205 transitions, 2381 flow [2024-06-03 20:33:49,881 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) [2024-06-03 20:33:49,882 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:49,882 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:49,882 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable41 [2024-06-03 20:33:49,882 INFO L420 AbstractCegarLoop]: === Iteration 43 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:49,882 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:49,882 INFO L85 PathProgramCache]: Analyzing trace with hash -965069260, now seen corresponding path program 1 times [2024-06-03 20:33:49,882 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:49,883 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [21694368] [2024-06-03 20:33:49,883 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:49,883 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:49,890 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:50,222 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:50,223 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:50,223 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [21694368] [2024-06-03 20:33:50,223 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [21694368] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:50,223 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:50,223 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:50,223 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1710664310] [2024-06-03 20:33:50,223 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:50,223 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:50,223 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:50,224 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:50,224 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:50,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:50,266 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) [2024-06-03 20:33:50,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:50,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:50,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:50,591 INFO L124 PetriNetUnfolderBase]: 1539/2621 cut-off events. [2024-06-03 20:33:50,591 INFO L125 PetriNetUnfolderBase]: For 77050/77064 co-relation queries the response was YES. [2024-06-03 20:33:50,605 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. [2024-06-03 20:33:50,614 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 143 selfloop transitions, 74 changer transitions 0/223 dead transitions. [2024-06-03 20:33:50,615 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 177 places, 223 transitions, 3048 flow [2024-06-03 20:33:50,615 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:50,615 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:50,617 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-03 20:33:50,618 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-03 20:33:50,618 INFO L175 Difference]: Start difference. First operand has 172 places, 205 transitions, 2381 flow. Second operand 6 states and 140 transitions. [2024-06-03 20:33:50,618 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 177 places, 223 transitions, 3048 flow [2024-06-03 20:33:50,770 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 173 places, 223 transitions, 2970 flow, removed 0 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:50,773 INFO L231 Difference]: Finished difference. Result has 174 places, 208 transitions, 2503 flow [2024-06-03 20:33:50,773 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} [2024-06-03 20:33:50,774 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 132 predicate places. [2024-06-03 20:33:50,775 INFO L495 AbstractCegarLoop]: Abstraction has has 174 places, 208 transitions, 2503 flow [2024-06-03 20:33:50,775 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) [2024-06-03 20:33:50,775 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:50,775 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:50,775 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable42 [2024-06-03 20:33:50,775 INFO L420 AbstractCegarLoop]: === Iteration 44 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:50,777 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:50,777 INFO L85 PathProgramCache]: Analyzing trace with hash -1985409868, now seen corresponding path program 2 times [2024-06-03 20:33:50,777 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:50,777 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [633945492] [2024-06-03 20:33:50,777 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:50,777 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:50,792 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:51,151 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:51,152 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:51,152 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [633945492] [2024-06-03 20:33:51,152 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [633945492] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:51,152 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:51,152 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:51,152 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1087959080] [2024-06-03 20:33:51,152 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:51,152 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:51,152 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:51,153 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:51,153 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:51,197 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:51,197 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) [2024-06-03 20:33:51,197 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:51,197 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:51,197 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:51,550 INFO L124 PetriNetUnfolderBase]: 1541/2621 cut-off events. [2024-06-03 20:33:51,551 INFO L125 PetriNetUnfolderBase]: For 78303/78306 co-relation queries the response was YES. [2024-06-03 20:33:51,567 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. [2024-06-03 20:33:51,576 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 167 selfloop transitions, 59 changer transitions 0/232 dead transitions. [2024-06-03 20:33:51,577 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 179 places, 232 transitions, 3217 flow [2024-06-03 20:33:51,577 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:33:51,577 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:33:51,577 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 147 transitions. [2024-06-03 20:33:51,577 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-03 20:33:51,578 INFO L175 Difference]: Start difference. First operand has 174 places, 208 transitions, 2503 flow. Second operand 6 states and 147 transitions. [2024-06-03 20:33:51,578 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 179 places, 232 transitions, 3217 flow [2024-06-03 20:33:51,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 175 places, 232 transitions, 3016 flow, removed 20 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:51,767 INFO L231 Difference]: Finished difference. Result has 176 places, 211 transitions, 2481 flow [2024-06-03 20:33:51,767 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} [2024-06-03 20:33:51,768 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 134 predicate places. [2024-06-03 20:33:51,768 INFO L495 AbstractCegarLoop]: Abstraction has has 176 places, 211 transitions, 2481 flow [2024-06-03 20:33:51,768 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) [2024-06-03 20:33:51,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:51,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:51,769 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable43 [2024-06-03 20:33:51,769 INFO L420 AbstractCegarLoop]: === Iteration 45 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:51,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:51,769 INFO L85 PathProgramCache]: Analyzing trace with hash 1365253521, now seen corresponding path program 1 times [2024-06-03 20:33:51,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:51,770 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1102421583] [2024-06-03 20:33:51,770 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:51,770 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:51,778 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:52,214 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:52,215 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:52,215 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1102421583] [2024-06-03 20:33:52,215 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1102421583] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:52,215 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:52,215 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:52,215 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1209024763] [2024-06-03 20:33:52,216 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:52,216 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:52,216 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:52,216 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:52,217 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:52,269 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:52,269 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) [2024-06-03 20:33:52,269 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:52,269 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:52,269 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:52,684 INFO L124 PetriNetUnfolderBase]: 1549/2632 cut-off events. [2024-06-03 20:33:52,684 INFO L125 PetriNetUnfolderBase]: For 81218/81218 co-relation queries the response was YES. [2024-06-03 20:33:52,701 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. [2024-06-03 20:33:52,711 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 207 selfloop transitions, 31 changer transitions 0/244 dead transitions. [2024-06-03 20:33:52,711 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 182 places, 244 transitions, 3137 flow [2024-06-03 20:33:52,715 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:52,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:52,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-03 20:33:52,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-03 20:33:52,716 INFO L175 Difference]: Start difference. First operand has 176 places, 211 transitions, 2481 flow. Second operand 7 states and 162 transitions. [2024-06-03 20:33:52,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 182 places, 244 transitions, 3137 flow [2024-06-03 20:33:52,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 178 places, 244 transitions, 2989 flow, removed 16 selfloop flow, removed 4 redundant places. [2024-06-03 20:33:52,857 INFO L231 Difference]: Finished difference. Result has 179 places, 215 transitions, 2432 flow [2024-06-03 20:33:52,857 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} [2024-06-03 20:33:52,858 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 137 predicate places. [2024-06-03 20:33:52,858 INFO L495 AbstractCegarLoop]: Abstraction has has 179 places, 215 transitions, 2432 flow [2024-06-03 20:33:52,858 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) [2024-06-03 20:33:52,858 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:52,858 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:52,858 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable44 [2024-06-03 20:33:52,858 INFO L420 AbstractCegarLoop]: === Iteration 46 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:52,859 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:52,859 INFO L85 PathProgramCache]: Analyzing trace with hash -2135535191, now seen corresponding path program 2 times [2024-06-03 20:33:52,859 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:52,859 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1564460789] [2024-06-03 20:33:52,859 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:52,859 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:52,875 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:53,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:53,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:53,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1564460789] [2024-06-03 20:33:53,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1564460789] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:53,208 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:53,208 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:53,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2097720348] [2024-06-03 20:33:53,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:53,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:53,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:53,209 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:53,209 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:53,253 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:53,254 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) [2024-06-03 20:33:53,254 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:53,254 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:53,254 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:53,626 INFO L124 PetriNetUnfolderBase]: 1557/2644 cut-off events. [2024-06-03 20:33:53,626 INFO L125 PetriNetUnfolderBase]: For 84788/84788 co-relation queries the response was YES. [2024-06-03 20:33:53,642 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. [2024-06-03 20:33:53,651 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 207 selfloop transitions, 28 changer transitions 0/241 dead transitions. [2024-06-03 20:33:53,651 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 185 places, 241 transitions, 2980 flow [2024-06-03 20:33:53,652 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:53,652 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:53,652 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 20:33:53,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-03 20:33:53,652 INFO L175 Difference]: Start difference. First operand has 179 places, 215 transitions, 2432 flow. Second operand 7 states and 157 transitions. [2024-06-03 20:33:53,653 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 185 places, 241 transitions, 2980 flow [2024-06-03 20:33:53,819 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 182 places, 241 transitions, 2924 flow, removed 13 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:53,822 INFO L231 Difference]: Finished difference. Result has 183 places, 217 transitions, 2459 flow [2024-06-03 20:33:53,822 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} [2024-06-03 20:33:53,823 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 141 predicate places. [2024-06-03 20:33:53,823 INFO L495 AbstractCegarLoop]: Abstraction has has 183 places, 217 transitions, 2459 flow [2024-06-03 20:33:53,823 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) [2024-06-03 20:33:53,823 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:53,823 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:53,823 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable45 [2024-06-03 20:33:53,823 INFO L420 AbstractCegarLoop]: === Iteration 47 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:53,824 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:53,824 INFO L85 PathProgramCache]: Analyzing trace with hash 1368113457, now seen corresponding path program 1 times [2024-06-03 20:33:53,824 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:53,824 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [268069373] [2024-06-03 20:33:53,824 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:53,824 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:53,832 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:54,135 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:54,136 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:54,136 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [268069373] [2024-06-03 20:33:54,136 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [268069373] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:54,136 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:54,136 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:54,136 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [702743548] [2024-06-03 20:33:54,137 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:54,137 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:54,137 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:54,137 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:54,138 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:54,175 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:54,176 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) [2024-06-03 20:33:54,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:54,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:54,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:54,608 INFO L124 PetriNetUnfolderBase]: 1578/2663 cut-off events. [2024-06-03 20:33:54,608 INFO L125 PetriNetUnfolderBase]: For 89814/89814 co-relation queries the response was YES. [2024-06-03 20:33:54,624 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. [2024-06-03 20:33:54,632 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 178 selfloop transitions, 76 changer transitions 0/260 dead transitions. [2024-06-03 20:33:54,632 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 189 places, 260 transitions, 3525 flow [2024-06-03 20:33:54,633 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:54,633 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:54,633 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:33:54,633 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-03 20:33:54,633 INFO L175 Difference]: Start difference. First operand has 183 places, 217 transitions, 2459 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:33:54,634 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 189 places, 260 transitions, 3525 flow [2024-06-03 20:33:54,764 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 184 places, 260 transitions, 3470 flow, removed 1 selfloop flow, removed 5 redundant places. [2024-06-03 20:33:54,767 INFO L231 Difference]: Finished difference. Result has 185 places, 230 transitions, 2718 flow [2024-06-03 20:33:54,767 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} [2024-06-03 20:33:54,768 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 143 predicate places. [2024-06-03 20:33:54,768 INFO L495 AbstractCegarLoop]: Abstraction has has 185 places, 230 transitions, 2718 flow [2024-06-03 20:33:54,768 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) [2024-06-03 20:33:54,768 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:54,768 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:54,768 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable46 [2024-06-03 20:33:54,768 INFO L420 AbstractCegarLoop]: === Iteration 48 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:54,769 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:54,769 INFO L85 PathProgramCache]: Analyzing trace with hash -1407616041, now seen corresponding path program 2 times [2024-06-03 20:33:54,769 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:54,769 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1221906413] [2024-06-03 20:33:54,769 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:54,769 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:54,776 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:55,070 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:55,071 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:55,071 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1221906413] [2024-06-03 20:33:55,071 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1221906413] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:55,071 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:55,071 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:55,071 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [890362240] [2024-06-03 20:33:55,071 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:55,071 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:55,072 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:55,072 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:55,072 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:55,106 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:55,107 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) [2024-06-03 20:33:55,107 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:55,107 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:55,107 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:55,494 INFO L124 PetriNetUnfolderBase]: 1599/2696 cut-off events. [2024-06-03 20:33:55,495 INFO L125 PetriNetUnfolderBase]: For 97599/97599 co-relation queries the response was YES. [2024-06-03 20:33:55,510 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. [2024-06-03 20:33:55,520 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 175 selfloop transitions, 83 changer transitions 0/264 dead transitions. [2024-06-03 20:33:55,520 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 191 places, 264 transitions, 3740 flow [2024-06-03 20:33:55,521 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:55,521 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:55,544 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:33:55,544 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:33:55,545 INFO L175 Difference]: Start difference. First operand has 185 places, 230 transitions, 2718 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:33:55,545 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 191 places, 264 transitions, 3740 flow [2024-06-03 20:33:55,720 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 190 places, 264 transitions, 3630 flow, removed 41 selfloop flow, removed 1 redundant places. [2024-06-03 20:33:55,724 INFO L231 Difference]: Finished difference. Result has 191 places, 237 transitions, 2876 flow [2024-06-03 20:33:55,724 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} [2024-06-03 20:33:55,724 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 149 predicate places. [2024-06-03 20:33:55,724 INFO L495 AbstractCegarLoop]: Abstraction has has 191 places, 237 transitions, 2876 flow [2024-06-03 20:33:55,725 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) [2024-06-03 20:33:55,725 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:55,725 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:55,725 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable47 [2024-06-03 20:33:55,725 INFO L420 AbstractCegarLoop]: === Iteration 49 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:55,725 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:55,725 INFO L85 PathProgramCache]: Analyzing trace with hash -936107351, now seen corresponding path program 3 times [2024-06-03 20:33:55,726 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:55,726 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1610353232] [2024-06-03 20:33:55,726 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:55,726 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:55,733 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:56,094 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:56,094 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:56,095 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1610353232] [2024-06-03 20:33:56,095 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1610353232] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:56,095 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:56,095 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:56,095 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [9765917] [2024-06-03 20:33:56,095 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:56,095 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:56,096 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:56,096 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:56,096 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:56,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:56,142 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) [2024-06-03 20:33:56,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:56,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:56,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:56,495 INFO L124 PetriNetUnfolderBase]: 1607/2716 cut-off events. [2024-06-03 20:33:56,495 INFO L125 PetriNetUnfolderBase]: For 102769/102769 co-relation queries the response was YES. [2024-06-03 20:33:56,511 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. [2024-06-03 20:33:56,518 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 224 selfloop transitions, 27 changer transitions 0/257 dead transitions. [2024-06-03 20:33:56,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 197 places, 257 transitions, 3436 flow [2024-06-03 20:33:56,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:56,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:56,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 152 transitions. [2024-06-03 20:33:56,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5296167247386759 [2024-06-03 20:33:56,520 INFO L175 Difference]: Start difference. First operand has 191 places, 237 transitions, 2876 flow. Second operand 7 states and 152 transitions. [2024-06-03 20:33:56,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 197 places, 257 transitions, 3436 flow [2024-06-03 20:33:56,683 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 194 places, 257 transitions, 3295 flow, removed 12 selfloop flow, removed 3 redundant places. [2024-06-03 20:33:56,686 INFO L231 Difference]: Finished difference. Result has 195 places, 239 transitions, 2812 flow [2024-06-03 20:33:56,687 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} [2024-06-03 20:33:56,687 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 153 predicate places. [2024-06-03 20:33:56,687 INFO L495 AbstractCegarLoop]: Abstraction has has 195 places, 239 transitions, 2812 flow [2024-06-03 20:33:56,687 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) [2024-06-03 20:33:56,687 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:56,687 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:56,688 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable48 [2024-06-03 20:33:56,688 INFO L420 AbstractCegarLoop]: === Iteration 50 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:56,688 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:56,688 INFO L85 PathProgramCache]: Analyzing trace with hash 1483404627, now seen corresponding path program 3 times [2024-06-03 20:33:56,688 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:56,688 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1325600218] [2024-06-03 20:33:56,688 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:56,688 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:56,695 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:56,993 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:56,994 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:56,998 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1325600218] [2024-06-03 20:33:56,998 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1325600218] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:56,999 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:56,999 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:56,999 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [893230750] [2024-06-03 20:33:56,999 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:56,999 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:56,999 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:57,000 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:57,000 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:57,081 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:57,082 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) [2024-06-03 20:33:57,082 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:57,082 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:57,082 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:57,519 INFO L124 PetriNetUnfolderBase]: 1630/2746 cut-off events. [2024-06-03 20:33:57,519 INFO L125 PetriNetUnfolderBase]: For 107246/107246 co-relation queries the response was YES. [2024-06-03 20:33:57,534 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. [2024-06-03 20:33:57,542 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 211 selfloop transitions, 60 changer transitions 0/277 dead transitions. [2024-06-03 20:33:57,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 201 places, 277 transitions, 3857 flow [2024-06-03 20:33:57,542 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:57,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:57,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:33:57,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-03 20:33:57,543 INFO L175 Difference]: Start difference. First operand has 195 places, 239 transitions, 2812 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:33:57,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 201 places, 277 transitions, 3857 flow [2024-06-03 20:33:57,725 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 196 places, 277 transitions, 3800 flow, removed 3 selfloop flow, removed 5 redundant places. [2024-06-03 20:33:57,729 INFO L231 Difference]: Finished difference. Result has 198 places, 251 transitions, 3071 flow [2024-06-03 20:33:57,729 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} [2024-06-03 20:33:57,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 156 predicate places. [2024-06-03 20:33:57,729 INFO L495 AbstractCegarLoop]: Abstraction has has 198 places, 251 transitions, 3071 flow [2024-06-03 20:33:57,729 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) [2024-06-03 20:33:57,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:57,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:57,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable49 [2024-06-03 20:33:57,730 INFO L420 AbstractCegarLoop]: === Iteration 51 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:57,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:57,730 INFO L85 PathProgramCache]: Analyzing trace with hash 1483703157, now seen corresponding path program 4 times [2024-06-03 20:33:57,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:57,730 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [164911342] [2024-06-03 20:33:57,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:57,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:57,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:58,059 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:58,059 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:58,059 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [164911342] [2024-06-03 20:33:58,059 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [164911342] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:58,059 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:58,059 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:58,059 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2023262205] [2024-06-03 20:33:58,059 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:58,059 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:58,060 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:58,060 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:58,060 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:58,111 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:58,112 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) [2024-06-03 20:33:58,112 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:58,112 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:58,112 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:58,609 INFO L124 PetriNetUnfolderBase]: 1640/2762 cut-off events. [2024-06-03 20:33:58,610 INFO L125 PetriNetUnfolderBase]: For 112152/112152 co-relation queries the response was YES. [2024-06-03 20:33:58,637 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. [2024-06-03 20:33:58,650 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 212 selfloop transitions, 67 changer transitions 0/285 dead transitions. [2024-06-03 20:33:58,650 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 206 places, 285 transitions, 4064 flow [2024-06-03 20:33:58,651 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:33:58,651 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:33:58,651 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-03 20:33:58,652 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-03 20:33:58,652 INFO L175 Difference]: Start difference. First operand has 198 places, 251 transitions, 3071 flow. Second operand 9 states and 200 transitions. [2024-06-03 20:33:58,652 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 206 places, 285 transitions, 4064 flow [2024-06-03 20:33:58,932 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 204 places, 285 transitions, 3946 flow, removed 23 selfloop flow, removed 2 redundant places. [2024-06-03 20:33:58,936 INFO L231 Difference]: Finished difference. Result has 205 places, 257 transitions, 3184 flow [2024-06-03 20:33:58,936 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} [2024-06-03 20:33:58,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 163 predicate places. [2024-06-03 20:33:58,936 INFO L495 AbstractCegarLoop]: Abstraction has has 205 places, 257 transitions, 3184 flow [2024-06-03 20:33:58,937 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) [2024-06-03 20:33:58,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:33:58,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:33:58,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable50 [2024-06-03 20:33:58,937 INFO L420 AbstractCegarLoop]: === Iteration 52 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:33:58,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:33:58,937 INFO L85 PathProgramCache]: Analyzing trace with hash 1138018579, now seen corresponding path program 1 times [2024-06-03 20:33:58,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:33:58,938 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1234472586] [2024-06-03 20:33:58,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:33:58,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:33:58,946 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:33:59,257 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:33:59,257 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:33:59,257 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1234472586] [2024-06-03 20:33:59,257 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1234472586] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:33:59,258 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:33:59,258 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:33:59,258 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [951261293] [2024-06-03 20:33:59,258 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:33:59,258 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:33:59,258 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:33:59,259 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:33:59,259 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:33:59,293 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:33:59,293 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) [2024-06-03 20:33:59,294 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:33:59,294 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:33:59,294 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:33:59,703 INFO L124 PetriNetUnfolderBase]: 1645/2773 cut-off events. [2024-06-03 20:33:59,703 INFO L125 PetriNetUnfolderBase]: For 116626/116626 co-relation queries the response was YES. [2024-06-03 20:33:59,722 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. [2024-06-03 20:33:59,731 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 218 selfloop transitions, 58 changer transitions 0/282 dead transitions. [2024-06-03 20:33:59,731 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 211 places, 282 transitions, 4026 flow [2024-06-03 20:33:59,732 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:33:59,732 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:33:59,732 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 20:33:59,732 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:33:59,733 INFO L175 Difference]: Start difference. First operand has 205 places, 257 transitions, 3184 flow. Second operand 7 states and 161 transitions. [2024-06-03 20:33:59,733 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 211 places, 282 transitions, 4026 flow [2024-06-03 20:34:00,002 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 205 places, 282 transitions, 3872 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 20:34:00,006 INFO L231 Difference]: Finished difference. Result has 206 places, 260 transitions, 3200 flow [2024-06-03 20:34:00,007 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} [2024-06-03 20:34:00,007 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 164 predicate places. [2024-06-03 20:34:00,007 INFO L495 AbstractCegarLoop]: Abstraction has has 206 places, 260 transitions, 3200 flow [2024-06-03 20:34:00,007 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) [2024-06-03 20:34:00,008 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:00,008 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:00,008 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable51 [2024-06-03 20:34:00,008 INFO L420 AbstractCegarLoop]: === Iteration 53 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:00,008 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:00,008 INFO L85 PathProgramCache]: Analyzing trace with hash -1848644885, now seen corresponding path program 5 times [2024-06-03 20:34:00,008 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:00,009 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [851250708] [2024-06-03 20:34:00,009 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:00,009 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:00,017 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:00,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:00,300 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:00,300 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [851250708] [2024-06-03 20:34:00,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [851250708] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:00,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:00,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:00,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2116918758] [2024-06-03 20:34:00,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:00,301 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:00,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:00,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:00,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:00,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:00,328 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) [2024-06-03 20:34:00,328 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:00,328 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:00,328 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:00,770 INFO L124 PetriNetUnfolderBase]: 1674/2813 cut-off events. [2024-06-03 20:34:00,771 INFO L125 PetriNetUnfolderBase]: For 124767/124767 co-relation queries the response was YES. [2024-06-03 20:34:00,786 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. [2024-06-03 20:34:00,794 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 176 selfloop transitions, 109 changer transitions 0/291 dead transitions. [2024-06-03 20:34:00,794 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 212 places, 291 transitions, 4324 flow [2024-06-03 20:34:00,795 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:00,795 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:00,795 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 166 transitions. [2024-06-03 20:34:00,796 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.578397212543554 [2024-06-03 20:34:00,796 INFO L175 Difference]: Start difference. First operand has 206 places, 260 transitions, 3200 flow. Second operand 7 states and 166 transitions. [2024-06-03 20:34:00,796 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 212 places, 291 transitions, 4324 flow [2024-06-03 20:34:01,067 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 207 places, 291 transitions, 4194 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:01,071 INFO L231 Difference]: Finished difference. Result has 208 places, 270 transitions, 3414 flow [2024-06-03 20:34:01,071 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} [2024-06-03 20:34:01,071 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 166 predicate places. [2024-06-03 20:34:01,072 INFO L495 AbstractCegarLoop]: Abstraction has has 208 places, 270 transitions, 3414 flow [2024-06-03 20:34:01,072 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) [2024-06-03 20:34:01,072 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:01,072 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:01,072 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable52 [2024-06-03 20:34:01,072 INFO L420 AbstractCegarLoop]: === Iteration 54 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:01,072 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:01,072 INFO L85 PathProgramCache]: Analyzing trace with hash -97740047, now seen corresponding path program 6 times [2024-06-03 20:34:01,073 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:01,073 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1869453785] [2024-06-03 20:34:01,073 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:01,073 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:01,079 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:01,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:01,370 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:01,370 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1869453785] [2024-06-03 20:34:01,370 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1869453785] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:01,370 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:01,370 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:01,370 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1427151917] [2024-06-03 20:34:01,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:01,371 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:01,371 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:01,371 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:01,371 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:01,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:01,417 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) [2024-06-03 20:34:01,417 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:01,417 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:01,417 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:01,826 INFO L124 PetriNetUnfolderBase]: 1671/2814 cut-off events. [2024-06-03 20:34:01,827 INFO L125 PetriNetUnfolderBase]: For 128838/128838 co-relation queries the response was YES. [2024-06-03 20:34:01,846 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. [2024-06-03 20:34:01,856 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 222 selfloop transitions, 61 changer transitions 0/289 dead transitions. [2024-06-03 20:34:01,856 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 214 places, 289 transitions, 4222 flow [2024-06-03 20:34:01,856 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:01,856 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:01,857 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-03 20:34:01,857 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-03 20:34:01,857 INFO L175 Difference]: Start difference. First operand has 208 places, 270 transitions, 3414 flow. Second operand 7 states and 159 transitions. [2024-06-03 20:34:01,857 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 214 places, 289 transitions, 4222 flow [2024-06-03 20:34:02,122 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 211 places, 289 transitions, 4040 flow, removed 15 selfloop flow, removed 3 redundant places. [2024-06-03 20:34:02,125 INFO L231 Difference]: Finished difference. Result has 212 places, 270 transitions, 3360 flow [2024-06-03 20:34:02,126 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} [2024-06-03 20:34:02,126 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 170 predicate places. [2024-06-03 20:34:02,126 INFO L495 AbstractCegarLoop]: Abstraction has has 212 places, 270 transitions, 3360 flow [2024-06-03 20:34:02,127 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) [2024-06-03 20:34:02,127 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:02,127 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:02,127 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable53 [2024-06-03 20:34:02,127 INFO L420 AbstractCegarLoop]: === Iteration 55 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:02,127 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:02,127 INFO L85 PathProgramCache]: Analyzing trace with hash -591196947, now seen corresponding path program 2 times [2024-06-03 20:34:02,128 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:02,128 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1966386407] [2024-06-03 20:34:02,128 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:02,128 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:02,135 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:02,462 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:02,462 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:02,462 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1966386407] [2024-06-03 20:34:02,462 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1966386407] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:02,462 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:02,462 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:02,463 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1987563735] [2024-06-03 20:34:02,463 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:02,463 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:02,464 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:02,464 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:02,464 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=24, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:02,500 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:02,500 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) [2024-06-03 20:34:02,501 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:02,501 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:02,501 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:02,998 INFO L124 PetriNetUnfolderBase]: 1676/2825 cut-off events. [2024-06-03 20:34:03,002 INFO L125 PetriNetUnfolderBase]: For 133531/133531 co-relation queries the response was YES. [2024-06-03 20:34:03,020 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. [2024-06-03 20:34:03,030 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 226 selfloop transitions, 61 changer transitions 0/293 dead transitions. [2024-06-03 20:34:03,030 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 219 places, 293 transitions, 4230 flow [2024-06-03 20:34:03,030 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:03,031 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:03,031 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-03 20:34:03,031 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:34:03,031 INFO L175 Difference]: Start difference. First operand has 212 places, 270 transitions, 3360 flow. Second operand 8 states and 176 transitions. [2024-06-03 20:34:03,031 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 219 places, 293 transitions, 4230 flow [2024-06-03 20:34:03,358 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 215 places, 293 transitions, 4098 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:03,362 INFO L231 Difference]: Finished difference. Result has 216 places, 273 transitions, 3404 flow [2024-06-03 20:34:03,362 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} [2024-06-03 20:34:03,363 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 174 predicate places. [2024-06-03 20:34:03,363 INFO L495 AbstractCegarLoop]: Abstraction has has 216 places, 273 transitions, 3404 flow [2024-06-03 20:34:03,363 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) [2024-06-03 20:34:03,363 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:03,363 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:03,363 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable54 [2024-06-03 20:34:03,363 INFO L420 AbstractCegarLoop]: === Iteration 56 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:03,364 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:03,364 INFO L85 PathProgramCache]: Analyzing trace with hash -1848278465, now seen corresponding path program 1 times [2024-06-03 20:34:03,364 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:03,364 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [385150832] [2024-06-03 20:34:03,364 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:03,364 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:03,390 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:03,714 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:03,715 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:03,715 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [385150832] [2024-06-03 20:34:03,715 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [385150832] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:03,715 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:03,715 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:03,715 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2090634824] [2024-06-03 20:34:03,715 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:03,715 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:03,715 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:03,716 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:03,716 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:03,774 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:34:03,775 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) [2024-06-03 20:34:03,775 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:03,775 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:34:03,775 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:04,207 INFO L124 PetriNetUnfolderBase]: 1671/2824 cut-off events. [2024-06-03 20:34:04,208 INFO L125 PetriNetUnfolderBase]: For 153823/153823 co-relation queries the response was YES. [2024-06-03 20:34:04,228 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. [2024-06-03 20:34:04,238 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 170 selfloop transitions, 97 changer transitions 0/298 dead transitions. [2024-06-03 20:34:04,238 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 222 places, 298 transitions, 4246 flow [2024-06-03 20:34:04,238 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:04,238 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:04,239 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 20:34:04,239 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:34:04,239 INFO L175 Difference]: Start difference. First operand has 216 places, 273 transitions, 3404 flow. Second operand 7 states and 168 transitions. [2024-06-03 20:34:04,239 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 222 places, 298 transitions, 4246 flow [2024-06-03 20:34:04,621 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 217 places, 298 transitions, 4112 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:04,624 INFO L231 Difference]: Finished difference. Result has 218 places, 275 transitions, 3507 flow [2024-06-03 20:34:04,625 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} [2024-06-03 20:34:04,625 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 176 predicate places. [2024-06-03 20:34:04,625 INFO L495 AbstractCegarLoop]: Abstraction has has 218 places, 275 transitions, 3507 flow [2024-06-03 20:34:04,625 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:04,626 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:04,626 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:04,626 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable55 [2024-06-03 20:34:04,626 INFO L420 AbstractCegarLoop]: === Iteration 57 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:04,626 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:04,626 INFO L85 PathProgramCache]: Analyzing trace with hash 205879121, now seen corresponding path program 4 times [2024-06-03 20:34:04,626 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:04,626 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [985963644] [2024-06-03 20:34:04,627 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:04,627 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:04,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:04,965 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:04,965 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:04,965 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [985963644] [2024-06-03 20:34:04,966 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [985963644] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:04,966 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:04,966 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:04,966 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1353375993] [2024-06-03 20:34:04,966 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:04,966 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:04,966 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:04,967 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:04,967 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:05,006 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:05,007 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) [2024-06-03 20:34:05,007 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:05,007 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:05,007 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:05,432 INFO L124 PetriNetUnfolderBase]: 1743/2933 cut-off events. [2024-06-03 20:34:05,432 INFO L125 PetriNetUnfolderBase]: For 153954/153954 co-relation queries the response was YES. [2024-06-03 20:34:05,451 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. [2024-06-03 20:34:05,461 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 31 changer transitions 0/305 dead transitions. [2024-06-03 20:34:05,461 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 223 places, 305 transitions, 4207 flow [2024-06-03 20:34:05,461 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:34:05,461 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:34:05,462 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 150 transitions. [2024-06-03 20:34:05,462 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6097560975609756 [2024-06-03 20:34:05,462 INFO L175 Difference]: Start difference. First operand has 218 places, 275 transitions, 3507 flow. Second operand 6 states and 150 transitions. [2024-06-03 20:34:05,462 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 223 places, 305 transitions, 4207 flow [2024-06-03 20:34:05,844 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 218 places, 305 transitions, 4006 flow, removed 6 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:05,847 INFO L231 Difference]: Finished difference. Result has 219 places, 276 transitions, 3391 flow [2024-06-03 20:34:05,848 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} [2024-06-03 20:34:05,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 177 predicate places. [2024-06-03 20:34:05,848 INFO L495 AbstractCegarLoop]: Abstraction has has 219 places, 276 transitions, 3391 flow [2024-06-03 20:34:05,848 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) [2024-06-03 20:34:05,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:05,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:05,849 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable56 [2024-06-03 20:34:05,849 INFO L420 AbstractCegarLoop]: === Iteration 58 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:05,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:05,849 INFO L85 PathProgramCache]: Analyzing trace with hash 719598809, now seen corresponding path program 3 times [2024-06-03 20:34:05,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:05,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1265308937] [2024-06-03 20:34:05,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:05,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:05,881 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:06,207 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:06,207 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:06,207 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1265308937] [2024-06-03 20:34:06,207 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1265308937] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:06,207 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:06,207 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:06,208 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [518187387] [2024-06-03 20:34:06,208 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:06,208 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:06,208 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:06,208 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:06,208 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:06,241 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:06,241 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) [2024-06-03 20:34:06,241 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:06,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:06,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:06,688 INFO L124 PetriNetUnfolderBase]: 1740/2935 cut-off events. [2024-06-03 20:34:06,688 INFO L125 PetriNetUnfolderBase]: For 147379/147393 co-relation queries the response was YES. [2024-06-03 20:34:06,710 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. [2024-06-03 20:34:06,720 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 228 selfloop transitions, 56 changer transitions 0/290 dead transitions. [2024-06-03 20:34:06,720 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 224 places, 290 transitions, 4099 flow [2024-06-03 20:34:06,721 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:34:06,721 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:34:06,721 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-03 20:34:06,722 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-03 20:34:06,722 INFO L175 Difference]: Start difference. First operand has 219 places, 276 transitions, 3391 flow. Second operand 6 states and 136 transitions. [2024-06-03 20:34:06,722 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 224 places, 290 transitions, 4099 flow [2024-06-03 20:34:07,107 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 220 places, 290 transitions, 4036 flow, removed 5 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:07,110 INFO L231 Difference]: Finished difference. Result has 221 places, 276 transitions, 3446 flow [2024-06-03 20:34:07,111 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} [2024-06-03 20:34:07,111 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 179 predicate places. [2024-06-03 20:34:07,111 INFO L495 AbstractCegarLoop]: Abstraction has has 221 places, 276 transitions, 3446 flow [2024-06-03 20:34:07,111 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) [2024-06-03 20:34:07,111 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:07,111 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:07,112 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable57 [2024-06-03 20:34:07,112 INFO L420 AbstractCegarLoop]: === Iteration 59 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:07,114 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:07,114 INFO L85 PathProgramCache]: Analyzing trace with hash 601854047, now seen corresponding path program 7 times [2024-06-03 20:34:07,114 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:07,114 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1391730886] [2024-06-03 20:34:07,114 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:07,115 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:07,126 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:07,422 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:07,423 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:07,423 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1391730886] [2024-06-03 20:34:07,423 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1391730886] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:07,423 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:07,423 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:07,423 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [147221000] [2024-06-03 20:34:07,424 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:07,424 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:07,424 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:07,424 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:07,424 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:07,476 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:07,477 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) [2024-06-03 20:34:07,477 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:07,477 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:07,477 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:07,913 INFO L124 PetriNetUnfolderBase]: 1742/2926 cut-off events. [2024-06-03 20:34:07,914 INFO L125 PetriNetUnfolderBase]: For 150554/150554 co-relation queries the response was YES. [2024-06-03 20:34:07,932 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. [2024-06-03 20:34:07,941 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 195 selfloop transitions, 107 changer transitions 0/308 dead transitions. [2024-06-03 20:34:07,941 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 227 places, 308 transitions, 4482 flow [2024-06-03 20:34:07,941 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:07,941 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:07,942 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 173 transitions. [2024-06-03 20:34:07,942 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6027874564459931 [2024-06-03 20:34:07,942 INFO L175 Difference]: Start difference. First operand has 221 places, 276 transitions, 3446 flow. Second operand 7 states and 173 transitions. [2024-06-03 20:34:07,942 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 227 places, 308 transitions, 4482 flow [2024-06-03 20:34:08,262 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 223 places, 308 transitions, 4348 flow, removed 11 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:08,266 INFO L231 Difference]: Finished difference. Result has 225 places, 279 transitions, 3605 flow [2024-06-03 20:34:08,266 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} [2024-06-03 20:34:08,266 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 183 predicate places. [2024-06-03 20:34:08,266 INFO L495 AbstractCegarLoop]: Abstraction has has 225 places, 279 transitions, 3605 flow [2024-06-03 20:34:08,266 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) [2024-06-03 20:34:08,267 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:08,267 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:08,267 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable58 [2024-06-03 20:34:08,267 INFO L420 AbstractCegarLoop]: === Iteration 60 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:08,267 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:08,267 INFO L85 PathProgramCache]: Analyzing trace with hash 780810667, now seen corresponding path program 8 times [2024-06-03 20:34:08,267 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:08,267 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2028959133] [2024-06-03 20:34:08,268 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:08,268 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:08,274 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:08,571 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:08,571 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:08,571 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2028959133] [2024-06-03 20:34:08,571 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2028959133] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:08,571 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:08,572 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:08,572 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1857860415] [2024-06-03 20:34:08,572 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:08,572 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:08,572 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:08,572 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:08,573 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:08,616 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:08,616 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) [2024-06-03 20:34:08,616 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:08,617 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:08,617 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:09,085 INFO L124 PetriNetUnfolderBase]: 1736/2918 cut-off events. [2024-06-03 20:34:09,086 INFO L125 PetriNetUnfolderBase]: For 153514/153514 co-relation queries the response was YES. [2024-06-03 20:34:09,104 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. [2024-06-03 20:34:09,112 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 194 selfloop transitions, 110 changer transitions 0/310 dead transitions. [2024-06-03 20:34:09,112 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 310 transitions, 4619 flow [2024-06-03 20:34:09,113 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:34:09,113 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:34:09,114 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-03 20:34:09,114 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-03 20:34:09,114 INFO L175 Difference]: Start difference. First operand has 225 places, 279 transitions, 3605 flow. Second operand 9 states and 211 transitions. [2024-06-03 20:34:09,114 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 310 transitions, 4619 flow [2024-06-03 20:34:09,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 227 places, 310 transitions, 4370 flow, removed 21 selfloop flow, removed 6 redundant places. [2024-06-03 20:34:09,466 INFO L231 Difference]: Finished difference. Result has 228 places, 279 transitions, 3607 flow [2024-06-03 20:34:09,467 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} [2024-06-03 20:34:09,467 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 186 predicate places. [2024-06-03 20:34:09,467 INFO L495 AbstractCegarLoop]: Abstraction has has 228 places, 279 transitions, 3607 flow [2024-06-03 20:34:09,467 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) [2024-06-03 20:34:09,467 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:09,467 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:09,468 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable59 [2024-06-03 20:34:09,468 INFO L420 AbstractCegarLoop]: === Iteration 61 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:09,468 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:09,468 INFO L85 PathProgramCache]: Analyzing trace with hash -1957102167, now seen corresponding path program 4 times [2024-06-03 20:34:09,468 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:09,468 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [637684335] [2024-06-03 20:34:09,468 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:09,469 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:09,475 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:09,786 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:09,786 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:09,786 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [637684335] [2024-06-03 20:34:09,786 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [637684335] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:09,786 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:09,787 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:09,787 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [519255035] [2024-06-03 20:34:09,787 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:09,787 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:09,787 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:09,787 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:09,788 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=23, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:09,824 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:09,824 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) [2024-06-03 20:34:09,824 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:09,824 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:09,824 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:10,233 INFO L124 PetriNetUnfolderBase]: 1733/2917 cut-off events. [2024-06-03 20:34:10,233 INFO L125 PetriNetUnfolderBase]: For 145370/145370 co-relation queries the response was YES. [2024-06-03 20:34:10,253 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. [2024-06-03 20:34:10,263 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 229 selfloop transitions, 60 changer transitions 0/295 dead transitions. [2024-06-03 20:34:10,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 233 places, 295 transitions, 4225 flow [2024-06-03 20:34:10,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:34:10,264 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:34:10,264 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 140 transitions. [2024-06-03 20:34:10,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-03 20:34:10,265 INFO L175 Difference]: Start difference. First operand has 228 places, 279 transitions, 3607 flow. Second operand 6 states and 140 transitions. [2024-06-03 20:34:10,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 233 places, 295 transitions, 4225 flow [2024-06-03 20:34:10,618 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 222 places, 295 transitions, 3968 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-03 20:34:10,622 INFO L231 Difference]: Finished difference. Result has 223 places, 279 transitions, 3484 flow [2024-06-03 20:34:10,622 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} [2024-06-03 20:34:10,623 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 181 predicate places. [2024-06-03 20:34:10,623 INFO L495 AbstractCegarLoop]: Abstraction has has 223 places, 279 transitions, 3484 flow [2024-06-03 20:34:10,623 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) [2024-06-03 20:34:10,623 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:10,623 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:10,623 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable60 [2024-06-03 20:34:10,623 INFO L420 AbstractCegarLoop]: === Iteration 62 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:10,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:10,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1418413869, now seen corresponding path program 9 times [2024-06-03 20:34:10,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:10,624 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [549014539] [2024-06-03 20:34:10,624 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:10,624 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:10,631 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:10,945 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:10,945 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:10,945 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [549014539] [2024-06-03 20:34:10,945 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [549014539] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:10,945 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:10,945 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:10,945 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1446801905] [2024-06-03 20:34:10,946 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:10,946 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:10,946 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:10,946 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:10,946 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:10,998 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:10,998 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) [2024-06-03 20:34:10,998 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:10,998 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:10,998 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:11,429 INFO L124 PetriNetUnfolderBase]: 1809/3056 cut-off events. [2024-06-03 20:34:11,429 INFO L125 PetriNetUnfolderBase]: For 141046/141049 co-relation queries the response was YES. [2024-06-03 20:34:11,449 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. [2024-06-03 20:34:11,459 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 255 selfloop transitions, 75 changer transitions 0/336 dead transitions. [2024-06-03 20:34:11,459 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 228 places, 336 transitions, 4752 flow [2024-06-03 20:34:11,459 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:34:11,459 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:34:11,460 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 156 transitions. [2024-06-03 20:34:11,460 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-03 20:34:11,460 INFO L175 Difference]: Start difference. First operand has 223 places, 279 transitions, 3484 flow. Second operand 6 states and 156 transitions. [2024-06-03 20:34:11,460 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 228 places, 336 transitions, 4752 flow [2024-06-03 20:34:11,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 221 places, 336 transitions, 4606 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:34:11,808 INFO L231 Difference]: Finished difference. Result has 224 places, 307 transitions, 4011 flow [2024-06-03 20:34:11,808 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} [2024-06-03 20:34:11,809 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 182 predicate places. [2024-06-03 20:34:11,809 INFO L495 AbstractCegarLoop]: Abstraction has has 224 places, 307 transitions, 4011 flow [2024-06-03 20:34:11,809 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) [2024-06-03 20:34:11,809 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:11,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:11,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable61 [2024-06-03 20:34:11,810 INFO L420 AbstractCegarLoop]: === Iteration 63 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:11,810 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:11,810 INFO L85 PathProgramCache]: Analyzing trace with hash 205882097, now seen corresponding path program 10 times [2024-06-03 20:34:11,810 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:11,810 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [793464004] [2024-06-03 20:34:11,810 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:11,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:11,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:12,107 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:12,108 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:12,108 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [793464004] [2024-06-03 20:34:12,108 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [793464004] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:12,108 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:12,108 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:12,108 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [454467714] [2024-06-03 20:34:12,108 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:12,109 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:12,109 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:12,109 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:12,109 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:12,168 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:12,169 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) [2024-06-03 20:34:12,169 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:12,169 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:12,169 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:12,617 INFO L124 PetriNetUnfolderBase]: 1843/3111 cut-off events. [2024-06-03 20:34:12,617 INFO L125 PetriNetUnfolderBase]: For 140617/140623 co-relation queries the response was YES. [2024-06-03 20:34:12,638 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. [2024-06-03 20:34:12,648 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 224 selfloop transitions, 123 changer transitions 0/353 dead transitions. [2024-06-03 20:34:12,649 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 230 places, 353 transitions, 5203 flow [2024-06-03 20:34:12,649 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:12,649 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:12,649 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 179 transitions. [2024-06-03 20:34:12,649 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6236933797909407 [2024-06-03 20:34:12,650 INFO L175 Difference]: Start difference. First operand has 224 places, 307 transitions, 4011 flow. Second operand 7 states and 179 transitions. [2024-06-03 20:34:12,650 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 230 places, 353 transitions, 5203 flow [2024-06-03 20:34:13,000 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 228 places, 353 transitions, 5127 flow, removed 30 selfloop flow, removed 2 redundant places. [2024-06-03 20:34:13,004 INFO L231 Difference]: Finished difference. Result has 230 places, 322 transitions, 4494 flow [2024-06-03 20:34:13,005 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} [2024-06-03 20:34:13,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 188 predicate places. [2024-06-03 20:34:13,005 INFO L495 AbstractCegarLoop]: Abstraction has has 230 places, 322 transitions, 4494 flow [2024-06-03 20:34:13,005 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) [2024-06-03 20:34:13,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:13,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:13,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable62 [2024-06-03 20:34:13,006 INFO L420 AbstractCegarLoop]: === Iteration 64 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:13,006 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:13,006 INFO L85 PathProgramCache]: Analyzing trace with hash -742217203, now seen corresponding path program 11 times [2024-06-03 20:34:13,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:13,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1673684758] [2024-06-03 20:34:13,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:13,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:13,014 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:13,305 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:13,305 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:13,306 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1673684758] [2024-06-03 20:34:13,306 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1673684758] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:13,306 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:13,306 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:13,306 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1860809530] [2024-06-03 20:34:13,306 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:13,306 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:13,306 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:13,310 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:13,310 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:13,343 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:13,343 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) [2024-06-03 20:34:13,343 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:13,343 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:13,344 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:13,824 INFO L124 PetriNetUnfolderBase]: 1837/3103 cut-off events. [2024-06-03 20:34:13,824 INFO L125 PetriNetUnfolderBase]: For 145881/145887 co-relation queries the response was YES. [2024-06-03 20:34:13,844 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. [2024-06-03 20:34:13,853 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 273 selfloop transitions, 69 changer transitions 0/348 dead transitions. [2024-06-03 20:34:13,854 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 236 places, 348 transitions, 5244 flow [2024-06-03 20:34:13,854 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:13,854 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:13,855 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:34:13,855 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:34:13,855 INFO L175 Difference]: Start difference. First operand has 230 places, 322 transitions, 4494 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:34:13,855 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 236 places, 348 transitions, 5244 flow [2024-06-03 20:34:14,179 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 233 places, 348 transitions, 5110 flow, removed 41 selfloop flow, removed 3 redundant places. [2024-06-03 20:34:14,183 INFO L231 Difference]: Finished difference. Result has 234 places, 322 transitions, 4512 flow [2024-06-03 20:34:14,184 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} [2024-06-03 20:34:14,184 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 192 predicate places. [2024-06-03 20:34:14,184 INFO L495 AbstractCegarLoop]: Abstraction has has 234 places, 322 transitions, 4512 flow [2024-06-03 20:34:14,184 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) [2024-06-03 20:34:14,184 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:14,185 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:14,185 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable63 [2024-06-03 20:34:14,185 INFO L420 AbstractCegarLoop]: === Iteration 65 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:14,185 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:14,185 INFO L85 PathProgramCache]: Analyzing trace with hash 605745827, now seen corresponding path program 2 times [2024-06-03 20:34:14,185 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:14,185 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [585602420] [2024-06-03 20:34:14,186 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:14,186 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:14,192 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:14,497 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:14,497 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:14,497 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [585602420] [2024-06-03 20:34:14,497 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [585602420] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:14,497 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:14,498 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:14,498 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [74362929] [2024-06-03 20:34:14,498 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:14,498 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:14,498 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:14,498 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:14,499 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:14,534 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:34:14,534 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) [2024-06-03 20:34:14,535 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:14,535 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:34:14,535 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:14,976 INFO L124 PetriNetUnfolderBase]: 1826/3100 cut-off events. [2024-06-03 20:34:14,976 INFO L125 PetriNetUnfolderBase]: For 163531/163531 co-relation queries the response was YES. [2024-06-03 20:34:14,997 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. [2024-06-03 20:34:15,008 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 257 selfloop transitions, 62 changer transitions 0/351 dead transitions. [2024-06-03 20:34:15,009 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 239 places, 351 transitions, 5290 flow [2024-06-03 20:34:15,009 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:34:15,009 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:34:15,009 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-03 20:34:15,010 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-03 20:34:15,010 INFO L175 Difference]: Start difference. First operand has 234 places, 322 transitions, 4512 flow. Second operand 6 states and 155 transitions. [2024-06-03 20:34:15,010 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 239 places, 351 transitions, 5290 flow [2024-06-03 20:34:15,301 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 231 places, 351 transitions, 5011 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 20:34:15,305 INFO L231 Difference]: Finished difference. Result has 232 places, 325 transitions, 4426 flow [2024-06-03 20:34:15,306 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} [2024-06-03 20:34:15,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 190 predicate places. [2024-06-03 20:34:15,306 INFO L495 AbstractCegarLoop]: Abstraction has has 232 places, 325 transitions, 4426 flow [2024-06-03 20:34:15,306 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:15,306 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:15,306 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:15,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable64 [2024-06-03 20:34:15,307 INFO L420 AbstractCegarLoop]: === Iteration 66 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:15,307 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:15,307 INFO L85 PathProgramCache]: Analyzing trace with hash 205059225, now seen corresponding path program 3 times [2024-06-03 20:34:15,307 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:15,307 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [908676054] [2024-06-03 20:34:15,307 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:15,307 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:15,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:15,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:15,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:15,621 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [908676054] [2024-06-03 20:34:15,622 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [908676054] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:15,622 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:15,622 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:15,622 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [502561570] [2024-06-03 20:34:15,622 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:15,622 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:15,622 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:15,623 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:15,623 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:15,666 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:34:15,667 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) [2024-06-03 20:34:15,667 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:15,667 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:34:15,667 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:16,126 INFO L124 PetriNetUnfolderBase]: 1866/3169 cut-off events. [2024-06-03 20:34:16,126 INFO L125 PetriNetUnfolderBase]: For 166492/166492 co-relation queries the response was YES. [2024-06-03 20:34:16,149 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. [2024-06-03 20:34:16,161 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 248 selfloop transitions, 73 changer transitions 0/353 dead transitions. [2024-06-03 20:34:16,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 238 places, 353 transitions, 5412 flow [2024-06-03 20:34:16,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:16,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:16,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:34:16,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:34:16,162 INFO L175 Difference]: Start difference. First operand has 232 places, 325 transitions, 4426 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:34:16,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 238 places, 353 transitions, 5412 flow [2024-06-03 20:34:16,557 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 234 places, 353 transitions, 5283 flow, removed 8 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:16,561 INFO L231 Difference]: Finished difference. Result has 235 places, 327 transitions, 4498 flow [2024-06-03 20:34:16,561 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} [2024-06-03 20:34:16,562 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 193 predicate places. [2024-06-03 20:34:16,562 INFO L495 AbstractCegarLoop]: Abstraction has has 235 places, 327 transitions, 4498 flow [2024-06-03 20:34:16,562 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:16,562 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:16,562 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:16,562 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable65 [2024-06-03 20:34:16,562 INFO L420 AbstractCegarLoop]: === Iteration 67 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:16,563 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:16,563 INFO L85 PathProgramCache]: Analyzing trace with hash 620030627, now seen corresponding path program 4 times [2024-06-03 20:34:16,563 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:16,563 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1974510679] [2024-06-03 20:34:16,563 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:16,563 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:16,570 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:16,885 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:16,885 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:16,885 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1974510679] [2024-06-03 20:34:16,886 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1974510679] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:16,886 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:16,886 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:16,886 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2135040088] [2024-06-03 20:34:16,886 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:16,886 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:16,886 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:16,887 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:16,887 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:16,937 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 14 out of 41 [2024-06-03 20:34:16,937 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) [2024-06-03 20:34:16,937 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:16,937 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 14 of 41 [2024-06-03 20:34:16,937 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:17,468 INFO L124 PetriNetUnfolderBase]: 2023/3412 cut-off events. [2024-06-03 20:34:17,469 INFO L125 PetriNetUnfolderBase]: For 199650/199650 co-relation queries the response was YES. [2024-06-03 20:34:17,492 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. [2024-06-03 20:34:17,504 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 268 selfloop transitions, 64 changer transitions 0/364 dead transitions. [2024-06-03 20:34:17,505 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 240 places, 364 transitions, 5498 flow [2024-06-03 20:34:17,505 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:34:17,505 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:34:17,505 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 160 transitions. [2024-06-03 20:34:17,506 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6504065040650406 [2024-06-03 20:34:17,506 INFO L175 Difference]: Start difference. First operand has 235 places, 327 transitions, 4498 flow. Second operand 6 states and 160 transitions. [2024-06-03 20:34:17,506 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 240 places, 364 transitions, 5498 flow [2024-06-03 20:34:17,926 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 235 places, 364 transitions, 5335 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:17,930 INFO L231 Difference]: Finished difference. Result has 237 places, 333 transitions, 4611 flow [2024-06-03 20:34:17,931 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} [2024-06-03 20:34:17,931 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 195 predicate places. [2024-06-03 20:34:17,931 INFO L495 AbstractCegarLoop]: Abstraction has has 237 places, 333 transitions, 4611 flow [2024-06-03 20:34:17,931 INFO L496 AbstractCegarLoop]: INTERPOLANT automaton has has 7 states, 7 states have (on average 16.285714285714285) internal successors, (114), 7 states have internal predecessors, (114), 0 states have call successors, (0), 0 states have call predecessors, (0), 0 states have return successors, (0), 0 states have call predecessors, (0), 0 states have call successors, (0) [2024-06-03 20:34:17,931 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:17,931 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:17,931 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable66 [2024-06-03 20:34:17,932 INFO L420 AbstractCegarLoop]: === Iteration 68 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:17,932 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:17,932 INFO L85 PathProgramCache]: Analyzing trace with hash 144763211, now seen corresponding path program 1 times [2024-06-03 20:34:17,932 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:17,932 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [443498143] [2024-06-03 20:34:17,932 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:17,932 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:17,939 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:18,239 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:18,239 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:18,239 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [443498143] [2024-06-03 20:34:18,240 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [443498143] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:18,240 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:18,240 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:18,240 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1383172020] [2024-06-03 20:34:18,240 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:18,240 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:18,240 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:18,241 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:18,241 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=27, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:18,306 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:18,306 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) [2024-06-03 20:34:18,306 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:18,306 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:18,306 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:18,895 INFO L124 PetriNetUnfolderBase]: 2119/3542 cut-off events. [2024-06-03 20:34:18,895 INFO L125 PetriNetUnfolderBase]: For 199487/199504 co-relation queries the response was YES. [2024-06-03 20:34:18,922 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. [2024-06-03 20:34:18,943 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 284 selfloop transitions, 70 changer transitions 0/360 dead transitions. [2024-06-03 20:34:18,943 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 242 places, 360 transitions, 5608 flow [2024-06-03 20:34:18,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:34:18,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:34:18,944 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 141 transitions. [2024-06-03 20:34:18,944 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-03 20:34:18,944 INFO L175 Difference]: Start difference. First operand has 237 places, 333 transitions, 4611 flow. Second operand 6 states and 141 transitions. [2024-06-03 20:34:18,944 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 242 places, 360 transitions, 5608 flow [2024-06-03 20:34:19,371 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 240 places, 360 transitions, 5521 flow, removed 15 selfloop flow, removed 2 redundant places. [2024-06-03 20:34:19,375 INFO L231 Difference]: Finished difference. Result has 242 places, 341 transitions, 4830 flow [2024-06-03 20:34:19,376 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} [2024-06-03 20:34:19,376 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 200 predicate places. [2024-06-03 20:34:19,376 INFO L495 AbstractCegarLoop]: Abstraction has has 242 places, 341 transitions, 4830 flow [2024-06-03 20:34:19,377 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) [2024-06-03 20:34:19,377 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:19,377 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:19,377 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable67 [2024-06-03 20:34:19,377 INFO L420 AbstractCegarLoop]: === Iteration 69 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:19,377 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:19,377 INFO L85 PathProgramCache]: Analyzing trace with hash 408908555, now seen corresponding path program 2 times [2024-06-03 20:34:19,377 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:19,378 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [344834442] [2024-06-03 20:34:19,378 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:19,378 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:19,385 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:19,713 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:19,713 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:19,713 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [344834442] [2024-06-03 20:34:19,713 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [344834442] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:19,713 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:19,713 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:19,713 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1842941225] [2024-06-03 20:34:19,713 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:19,714 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:19,714 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:19,714 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:19,714 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:19,756 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:19,757 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) [2024-06-03 20:34:19,757 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:19,757 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:19,757 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:20,285 INFO L124 PetriNetUnfolderBase]: 2122/3559 cut-off events. [2024-06-03 20:34:20,286 INFO L125 PetriNetUnfolderBase]: For 203166/203183 co-relation queries the response was YES. [2024-06-03 20:34:20,311 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. [2024-06-03 20:34:20,325 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 288 selfloop transitions, 63 changer transitions 0/357 dead transitions. [2024-06-03 20:34:20,325 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 247 places, 357 transitions, 5608 flow [2024-06-03 20:34:20,326 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:34:20,326 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:34:20,326 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 136 transitions. [2024-06-03 20:34:20,326 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-03 20:34:20,326 INFO L175 Difference]: Start difference. First operand has 242 places, 341 transitions, 4830 flow. Second operand 6 states and 136 transitions. [2024-06-03 20:34:20,326 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 247 places, 357 transitions, 5608 flow [2024-06-03 20:34:20,713 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 245 places, 357 transitions, 5452 flow, removed 43 selfloop flow, removed 2 redundant places. [2024-06-03 20:34:20,717 INFO L231 Difference]: Finished difference. Result has 246 places, 343 transitions, 4852 flow [2024-06-03 20:34:20,718 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} [2024-06-03 20:34:20,718 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 204 predicate places. [2024-06-03 20:34:20,718 INFO L495 AbstractCegarLoop]: Abstraction has has 246 places, 343 transitions, 4852 flow [2024-06-03 20:34:20,718 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) [2024-06-03 20:34:20,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:20,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:20,719 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable68 [2024-06-03 20:34:20,719 INFO L420 AbstractCegarLoop]: === Iteration 70 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:20,719 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:20,719 INFO L85 PathProgramCache]: Analyzing trace with hash -1418167605, now seen corresponding path program 3 times [2024-06-03 20:34:20,719 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:20,719 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [217244698] [2024-06-03 20:34:20,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:20,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:20,726 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:21,052 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:21,052 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:21,052 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [217244698] [2024-06-03 20:34:21,052 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [217244698] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:21,052 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:21,052 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:21,053 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [202489366] [2024-06-03 20:34:21,053 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:21,053 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:21,053 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:21,053 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:21,053 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=13, Invalid=29, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:21,120 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:21,121 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) [2024-06-03 20:34:21,121 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:21,121 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:21,121 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:21,752 INFO L124 PetriNetUnfolderBase]: 2136/3578 cut-off events. [2024-06-03 20:34:21,752 INFO L125 PetriNetUnfolderBase]: For 219506/219512 co-relation queries the response was YES. [2024-06-03 20:34:21,783 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. [2024-06-03 20:34:21,798 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 300 selfloop transitions, 65 changer transitions 0/371 dead transitions. [2024-06-03 20:34:21,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 251 places, 371 transitions, 5711 flow [2024-06-03 20:34:21,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:34:21,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:34:21,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 152 transitions. [2024-06-03 20:34:21,799 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6178861788617886 [2024-06-03 20:34:21,800 INFO L175 Difference]: Start difference. First operand has 246 places, 343 transitions, 4852 flow. Second operand 6 states and 152 transitions. [2024-06-03 20:34:21,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 251 places, 371 transitions, 5711 flow [2024-06-03 20:34:22,463 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 247 places, 371 transitions, 5563 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:22,469 INFO L231 Difference]: Finished difference. Result has 248 places, 345 transitions, 4895 flow [2024-06-03 20:34:22,470 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} [2024-06-03 20:34:22,470 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 206 predicate places. [2024-06-03 20:34:22,470 INFO L495 AbstractCegarLoop]: Abstraction has has 248 places, 345 transitions, 4895 flow [2024-06-03 20:34:22,470 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) [2024-06-03 20:34:22,470 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:22,471 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:22,471 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable69 [2024-06-03 20:34:22,471 INFO L420 AbstractCegarLoop]: === Iteration 71 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:22,471 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:22,471 INFO L85 PathProgramCache]: Analyzing trace with hash -371501503, now seen corresponding path program 1 times [2024-06-03 20:34:22,472 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:22,472 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [791402495] [2024-06-03 20:34:22,472 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:22,472 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:22,481 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:22,808 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:22,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:22,809 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [791402495] [2024-06-03 20:34:22,809 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [791402495] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:22,809 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:22,809 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:22,809 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1295167561] [2024-06-03 20:34:22,809 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:22,809 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:22,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:22,810 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:22,810 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:22,866 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:22,867 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) [2024-06-03 20:34:22,867 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:22,867 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:22,867 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:23,458 INFO L124 PetriNetUnfolderBase]: 2189/3662 cut-off events. [2024-06-03 20:34:23,458 INFO L125 PetriNetUnfolderBase]: For 213385/213385 co-relation queries the response was YES. [2024-06-03 20:34:23,487 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. [2024-06-03 20:34:23,503 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 318 selfloop transitions, 59 changer transitions 0/383 dead transitions. [2024-06-03 20:34:23,503 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 255 places, 383 transitions, 5915 flow [2024-06-03 20:34:23,503 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:23,503 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:23,504 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-03 20:34:23,504 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-03 20:34:23,504 INFO L175 Difference]: Start difference. First operand has 248 places, 345 transitions, 4895 flow. Second operand 8 states and 186 transitions. [2024-06-03 20:34:23,504 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 255 places, 383 transitions, 5915 flow [2024-06-03 20:34:24,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 251 places, 383 transitions, 5775 flow, removed 13 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:24,102 INFO L231 Difference]: Finished difference. Result has 252 places, 347 transitions, 4903 flow [2024-06-03 20:34:24,103 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} [2024-06-03 20:34:24,103 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 210 predicate places. [2024-06-03 20:34:24,103 INFO L495 AbstractCegarLoop]: Abstraction has has 252 places, 347 transitions, 4903 flow [2024-06-03 20:34:24,104 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) [2024-06-03 20:34:24,104 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:24,104 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:24,104 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable70 [2024-06-03 20:34:24,104 INFO L420 AbstractCegarLoop]: === Iteration 72 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:24,104 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:24,104 INFO L85 PathProgramCache]: Analyzing trace with hash -1776753963, now seen corresponding path program 2 times [2024-06-03 20:34:24,105 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:24,105 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1057363142] [2024-06-03 20:34:24,105 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:24,105 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:24,113 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:24,446 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:24,446 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:24,446 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1057363142] [2024-06-03 20:34:24,447 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1057363142] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:24,447 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:24,447 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:24,447 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1391759469] [2024-06-03 20:34:24,447 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:24,447 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:24,447 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:24,448 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:24,448 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:24,481 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:24,482 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) [2024-06-03 20:34:24,482 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:24,482 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:24,482 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:25,061 INFO L124 PetriNetUnfolderBase]: 2217/3710 cut-off events. [2024-06-03 20:34:25,061 INFO L125 PetriNetUnfolderBase]: For 222927/222927 co-relation queries the response was YES. [2024-06-03 20:34:25,088 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. [2024-06-03 20:34:25,103 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 318 selfloop transitions, 52 changer transitions 0/376 dead transitions. [2024-06-03 20:34:25,103 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 259 places, 376 transitions, 5753 flow [2024-06-03 20:34:25,103 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:25,104 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:25,104 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-03 20:34:25,104 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-03 20:34:25,104 INFO L175 Difference]: Start difference. First operand has 252 places, 347 transitions, 4903 flow. Second operand 8 states and 179 transitions. [2024-06-03 20:34:25,104 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 259 places, 376 transitions, 5753 flow [2024-06-03 20:34:25,577 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 255 places, 376 transitions, 5684 flow, removed 4 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:25,582 INFO L231 Difference]: Finished difference. Result has 256 places, 348 transitions, 4959 flow [2024-06-03 20:34:25,582 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} [2024-06-03 20:34:25,583 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 214 predicate places. [2024-06-03 20:34:25,583 INFO L495 AbstractCegarLoop]: Abstraction has has 256 places, 348 transitions, 4959 flow [2024-06-03 20:34:25,583 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) [2024-06-03 20:34:25,583 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:25,583 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] [2024-06-03 20:34:25,583 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable71 [2024-06-03 20:34:25,584 INFO L420 AbstractCegarLoop]: === Iteration 73 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:25,584 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:25,584 INFO L85 PathProgramCache]: Analyzing trace with hash -1777080393, now seen corresponding path program 3 times [2024-06-03 20:34:25,584 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:25,584 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1035006264] [2024-06-03 20:34:25,584 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:25,584 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:25,591 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:25,911 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:25,916 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:25,916 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1035006264] [2024-06-03 20:34:25,916 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1035006264] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:25,916 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:25,916 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:25,916 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [140632917] [2024-06-03 20:34:25,916 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:25,917 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:25,917 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:25,917 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:25,917 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:25,978 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:25,979 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) [2024-06-03 20:34:25,979 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:25,979 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:25,979 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:26,589 INFO L124 PetriNetUnfolderBase]: 2237/3742 cut-off events. [2024-06-03 20:34:26,589 INFO L125 PetriNetUnfolderBase]: For 226433/226433 co-relation queries the response was YES. [2024-06-03 20:34:26,615 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. [2024-06-03 20:34:26,628 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 320 selfloop transitions, 54 changer transitions 0/380 dead transitions. [2024-06-03 20:34:26,628 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 263 places, 380 transitions, 5837 flow [2024-06-03 20:34:26,628 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:26,628 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:26,629 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 20:34:26,629 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-03 20:34:26,629 INFO L175 Difference]: Start difference. First operand has 256 places, 348 transitions, 4959 flow. Second operand 8 states and 182 transitions. [2024-06-03 20:34:26,629 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 263 places, 380 transitions, 5837 flow [2024-06-03 20:34:27,157 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 257 places, 380 transitions, 5730 flow, removed 3 selfloop flow, removed 6 redundant places. [2024-06-03 20:34:27,161 INFO L231 Difference]: Finished difference. Result has 258 places, 349 transitions, 4982 flow [2024-06-03 20:34:27,162 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} [2024-06-03 20:34:27,162 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 216 predicate places. [2024-06-03 20:34:27,162 INFO L495 AbstractCegarLoop]: Abstraction has has 258 places, 349 transitions, 4982 flow [2024-06-03 20:34:27,162 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) [2024-06-03 20:34:27,162 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:27,162 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:27,163 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable72 [2024-06-03 20:34:27,163 INFO L420 AbstractCegarLoop]: === Iteration 74 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:27,163 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:27,163 INFO L85 PathProgramCache]: Analyzing trace with hash -538274861, now seen corresponding path program 1 times [2024-06-03 20:34:27,163 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:27,163 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [827916865] [2024-06-03 20:34:27,163 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:27,163 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:27,170 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:27,466 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:27,467 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:27,467 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [827916865] [2024-06-03 20:34:27,467 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [827916865] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:27,467 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:27,467 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:27,467 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [784340686] [2024-06-03 20:34:27,467 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:27,467 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:27,468 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:27,468 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:27,468 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=21, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:27,540 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:27,540 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) [2024-06-03 20:34:27,540 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:27,541 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:27,541 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:28,141 INFO L124 PetriNetUnfolderBase]: 2242/3755 cut-off events. [2024-06-03 20:34:28,141 INFO L125 PetriNetUnfolderBase]: For 226906/226917 co-relation queries the response was YES. [2024-06-03 20:34:28,171 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. [2024-06-03 20:34:28,186 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 248 selfloop transitions, 123 changer transitions 0/377 dead transitions. [2024-06-03 20:34:28,186 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 264 places, 377 transitions, 6078 flow [2024-06-03 20:34:28,186 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:34:28,187 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:34:28,187 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 20:34:28,187 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-03 20:34:28,187 INFO L175 Difference]: Start difference. First operand has 258 places, 349 transitions, 4982 flow. Second operand 7 states and 165 transitions. [2024-06-03 20:34:28,187 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 264 places, 377 transitions, 6078 flow [2024-06-03 20:34:28,854 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 258 places, 377 transitions, 5962 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 20:34:28,858 INFO L231 Difference]: Finished difference. Result has 259 places, 352 transitions, 5166 flow [2024-06-03 20:34:28,859 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} [2024-06-03 20:34:28,859 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 217 predicate places. [2024-06-03 20:34:28,859 INFO L495 AbstractCegarLoop]: Abstraction has has 259 places, 352 transitions, 5166 flow [2024-06-03 20:34:28,859 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) [2024-06-03 20:34:28,859 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:28,859 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] [2024-06-03 20:34:28,859 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable73 [2024-06-03 20:34:28,860 INFO L420 AbstractCegarLoop]: === Iteration 75 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:28,860 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:28,860 INFO L85 PathProgramCache]: Analyzing trace with hash -1403770479, now seen corresponding path program 1 times [2024-06-03 20:34:28,860 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:28,860 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [36131914] [2024-06-03 20:34:28,860 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:28,860 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:28,870 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:29,159 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:29,160 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:29,160 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [36131914] [2024-06-03 20:34:29,160 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [36131914] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:29,160 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:29,160 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:29,160 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [738188974] [2024-06-03 20:34:29,160 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:29,161 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:29,161 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:29,161 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:29,161 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:29,202 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:29,202 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) [2024-06-03 20:34:29,202 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:29,202 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:29,203 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:29,828 INFO L124 PetriNetUnfolderBase]: 2263/3770 cut-off events. [2024-06-03 20:34:29,828 INFO L125 PetriNetUnfolderBase]: For 237009/237009 co-relation queries the response was YES. [2024-06-03 20:34:29,859 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. [2024-06-03 20:34:29,873 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 193 selfloop transitions, 197 changer transitions 0/396 dead transitions. [2024-06-03 20:34:29,873 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 266 places, 396 transitions, 6768 flow [2024-06-03 20:34:29,874 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:29,874 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:29,874 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 20:34:29,874 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-03 20:34:29,875 INFO L175 Difference]: Start difference. First operand has 259 places, 352 transitions, 5166 flow. Second operand 8 states and 194 transitions. [2024-06-03 20:34:29,875 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 266 places, 396 transitions, 6768 flow [2024-06-03 20:34:30,400 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 260 places, 396 transitions, 6363 flow, removed 36 selfloop flow, removed 6 redundant places. [2024-06-03 20:34:30,405 INFO L231 Difference]: Finished difference. Result has 261 places, 365 transitions, 5419 flow [2024-06-03 20:34:30,405 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} [2024-06-03 20:34:30,405 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 219 predicate places. [2024-06-03 20:34:30,406 INFO L495 AbstractCegarLoop]: Abstraction has has 261 places, 365 transitions, 5419 flow [2024-06-03 20:34:30,406 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) [2024-06-03 20:34:30,406 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:30,406 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] [2024-06-03 20:34:30,406 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable74 [2024-06-03 20:34:30,406 INFO L420 AbstractCegarLoop]: === Iteration 76 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:30,406 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:30,407 INFO L85 PathProgramCache]: Analyzing trace with hash 2012159873, now seen corresponding path program 2 times [2024-06-03 20:34:30,407 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:30,407 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1631399277] [2024-06-03 20:34:30,407 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:30,407 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:30,414 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:30,733 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:30,733 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:30,734 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1631399277] [2024-06-03 20:34:30,734 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1631399277] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:30,734 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:30,734 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:30,734 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [842328705] [2024-06-03 20:34:30,734 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:30,734 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:30,735 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:30,735 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:30,735 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:30,786 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:30,786 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) [2024-06-03 20:34:30,786 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:30,786 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:30,786 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:31,499 INFO L124 PetriNetUnfolderBase]: 2268/3780 cut-off events. [2024-06-03 20:34:31,499 INFO L125 PetriNetUnfolderBase]: For 245162/245162 co-relation queries the response was YES. [2024-06-03 20:34:31,528 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. [2024-06-03 20:34:31,542 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 248 selfloop transitions, 143 changer transitions 0/397 dead transitions. [2024-06-03 20:34:31,542 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 268 places, 397 transitions, 6555 flow [2024-06-03 20:34:31,543 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:31,543 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:31,543 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 20:34:31,543 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-03 20:34:31,543 INFO L175 Difference]: Start difference. First operand has 261 places, 365 transitions, 5419 flow. Second operand 8 states and 188 transitions. [2024-06-03 20:34:31,543 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 268 places, 397 transitions, 6555 flow [2024-06-03 20:34:32,112 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 266 places, 397 transitions, 6396 flow, removed 47 selfloop flow, removed 2 redundant places. [2024-06-03 20:34:32,118 INFO L231 Difference]: Finished difference. Result has 267 places, 368 transitions, 5582 flow [2024-06-03 20:34:32,118 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} [2024-06-03 20:34:32,118 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 225 predicate places. [2024-06-03 20:34:32,118 INFO L495 AbstractCegarLoop]: Abstraction has has 267 places, 368 transitions, 5582 flow [2024-06-03 20:34:32,119 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) [2024-06-03 20:34:32,119 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:32,119 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] [2024-06-03 20:34:32,119 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable75 [2024-06-03 20:34:32,119 INFO L420 AbstractCegarLoop]: === Iteration 77 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:32,119 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:32,120 INFO L85 PathProgramCache]: Analyzing trace with hash -360786035, now seen corresponding path program 2 times [2024-06-03 20:34:32,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:32,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [688560020] [2024-06-03 20:34:32,120 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:32,120 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:32,128 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:32,431 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:32,432 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:32,432 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [688560020] [2024-06-03 20:34:32,432 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [688560020] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:32,432 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:32,432 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:32,432 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1021418759] [2024-06-03 20:34:32,432 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:32,432 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:32,434 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:32,435 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:32,435 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:32,475 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:32,475 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) [2024-06-03 20:34:32,475 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:32,475 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:32,476 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:33,083 INFO L124 PetriNetUnfolderBase]: 2297/3823 cut-off events. [2024-06-03 20:34:33,083 INFO L125 PetriNetUnfolderBase]: For 256724/256724 co-relation queries the response was YES. [2024-06-03 20:34:33,114 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. [2024-06-03 20:34:33,128 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 193 selfloop transitions, 207 changer transitions 0/406 dead transitions. [2024-06-03 20:34:33,128 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 274 places, 406 transitions, 7138 flow [2024-06-03 20:34:33,128 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:33,128 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:33,129 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-03 20:34:33,129 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-03 20:34:33,129 INFO L175 Difference]: Start difference. First operand has 267 places, 368 transitions, 5582 flow. Second operand 8 states and 193 transitions. [2024-06-03 20:34:33,129 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 274 places, 406 transitions, 7138 flow [2024-06-03 20:34:33,912 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 269 places, 406 transitions, 6914 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:33,918 INFO L231 Difference]: Finished difference. Result has 270 places, 378 transitions, 5954 flow [2024-06-03 20:34:33,918 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} [2024-06-03 20:34:33,918 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 228 predicate places. [2024-06-03 20:34:33,918 INFO L495 AbstractCegarLoop]: Abstraction has has 270 places, 378 transitions, 5954 flow [2024-06-03 20:34:33,918 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) [2024-06-03 20:34:33,919 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:33,919 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:33,919 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable76 [2024-06-03 20:34:33,919 INFO L420 AbstractCegarLoop]: === Iteration 78 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:33,919 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:33,919 INFO L85 PathProgramCache]: Analyzing trace with hash -361023185, now seen corresponding path program 3 times [2024-06-03 20:34:33,919 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:33,919 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [941770649] [2024-06-03 20:34:33,920 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:33,920 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:33,926 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:34,221 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:34,221 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:34,221 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [941770649] [2024-06-03 20:34:34,221 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [941770649] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:34,221 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:34,221 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:34,221 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1944563698] [2024-06-03 20:34:34,222 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:34,222 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:34,222 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:34,222 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:34,222 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:34,266 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:34,266 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) [2024-06-03 20:34:34,266 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:34,266 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:34,266 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:34,880 INFO L124 PetriNetUnfolderBase]: 2294/3820 cut-off events. [2024-06-03 20:34:34,881 INFO L125 PetriNetUnfolderBase]: For 263913/263913 co-relation queries the response was YES. [2024-06-03 20:34:34,910 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. [2024-06-03 20:34:34,925 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 196 selfloop transitions, 204 changer transitions 0/406 dead transitions. [2024-06-03 20:34:34,925 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 277 places, 406 transitions, 7342 flow [2024-06-03 20:34:34,926 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:34,926 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:34,926 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 193 transitions. [2024-06-03 20:34:34,926 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5884146341463414 [2024-06-03 20:34:34,926 INFO L175 Difference]: Start difference. First operand has 270 places, 378 transitions, 5954 flow. Second operand 8 states and 193 transitions. [2024-06-03 20:34:34,926 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 277 places, 406 transitions, 7342 flow [2024-06-03 20:34:35,745 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 273 places, 406 transitions, 6945 flow, removed 42 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:35,751 INFO L231 Difference]: Finished difference. Result has 274 places, 378 transitions, 5971 flow [2024-06-03 20:34:35,751 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} [2024-06-03 20:34:35,752 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 232 predicate places. [2024-06-03 20:34:35,752 INFO L495 AbstractCegarLoop]: Abstraction has has 274 places, 378 transitions, 5971 flow [2024-06-03 20:34:35,752 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) [2024-06-03 20:34:35,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:35,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:35,752 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable77 [2024-06-03 20:34:35,752 INFO L420 AbstractCegarLoop]: === Iteration 79 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:35,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:35,753 INFO L85 PathProgramCache]: Analyzing trace with hash -2083505633, now seen corresponding path program 3 times [2024-06-03 20:34:35,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:35,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1624257491] [2024-06-03 20:34:35,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:35,753 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:35,760 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:36,063 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:36,063 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:36,063 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1624257491] [2024-06-03 20:34:36,063 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1624257491] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:36,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:36,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:36,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [723944772] [2024-06-03 20:34:36,064 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:36,064 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:36,064 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:36,064 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:36,064 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:36,125 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:36,125 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) [2024-06-03 20:34:36,125 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:36,125 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:36,125 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:36,855 INFO L124 PetriNetUnfolderBase]: 2307/3846 cut-off events. [2024-06-03 20:34:36,856 INFO L125 PetriNetUnfolderBase]: For 273684/273684 co-relation queries the response was YES. [2024-06-03 20:34:36,883 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. [2024-06-03 20:34:36,898 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 257 selfloop transitions, 149 changer transitions 0/412 dead transitions. [2024-06-03 20:34:36,898 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 282 places, 412 transitions, 7321 flow [2024-06-03 20:34:36,899 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:34:36,899 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:34:36,899 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-03 20:34:36,900 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-03 20:34:36,900 INFO L175 Difference]: Start difference. First operand has 274 places, 378 transitions, 5971 flow. Second operand 9 states and 204 transitions. [2024-06-03 20:34:36,900 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 282 places, 412 transitions, 7321 flow [2024-06-03 20:34:37,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 278 places, 412 transitions, 6987 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:34:37,715 INFO L231 Difference]: Finished difference. Result has 279 places, 384 transitions, 6015 flow [2024-06-03 20:34:37,716 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} [2024-06-03 20:34:37,716 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 237 predicate places. [2024-06-03 20:34:37,716 INFO L495 AbstractCegarLoop]: Abstraction has has 279 places, 384 transitions, 6015 flow [2024-06-03 20:34:37,716 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) [2024-06-03 20:34:37,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:37,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:37,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable78 [2024-06-03 20:34:37,717 INFO L420 AbstractCegarLoop]: === Iteration 80 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:37,717 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:37,717 INFO L85 PathProgramCache]: Analyzing trace with hash -1473181325, now seen corresponding path program 4 times [2024-06-03 20:34:37,717 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:37,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467838684] [2024-06-03 20:34:37,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:37,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:37,724 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:38,035 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:38,035 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:38,035 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467838684] [2024-06-03 20:34:38,035 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467838684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:38,035 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:38,035 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:38,036 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [160689132] [2024-06-03 20:34:38,036 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:38,036 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:38,036 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:38,036 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:38,036 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:38,078 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:38,078 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) [2024-06-03 20:34:38,079 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:38,079 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:38,079 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:38,706 INFO L124 PetriNetUnfolderBase]: 2335/3901 cut-off events. [2024-06-03 20:34:38,706 INFO L125 PetriNetUnfolderBase]: For 296165/296165 co-relation queries the response was YES. [2024-06-03 20:34:38,737 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. [2024-06-03 20:34:38,752 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 352 selfloop transitions, 49 changer transitions 0/407 dead transitions. [2024-06-03 20:34:38,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 286 places, 407 transitions, 6915 flow [2024-06-03 20:34:38,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:38,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:38,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 175 transitions. [2024-06-03 20:34:38,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5335365853658537 [2024-06-03 20:34:38,753 INFO L175 Difference]: Start difference. First operand has 279 places, 384 transitions, 6015 flow. Second operand 8 states and 175 transitions. [2024-06-03 20:34:38,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 286 places, 407 transitions, 6915 flow [2024-06-03 20:34:39,787 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 280 places, 407 transitions, 6597 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 20:34:39,792 INFO L231 Difference]: Finished difference. Result has 281 places, 385 transitions, 5820 flow [2024-06-03 20:34:39,792 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} [2024-06-03 20:34:39,793 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 239 predicate places. [2024-06-03 20:34:39,793 INFO L495 AbstractCegarLoop]: Abstraction has has 281 places, 385 transitions, 5820 flow [2024-06-03 20:34:39,793 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) [2024-06-03 20:34:39,793 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:39,793 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:39,793 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable79 [2024-06-03 20:34:39,793 INFO L420 AbstractCegarLoop]: === Iteration 81 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:39,794 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:39,794 INFO L85 PathProgramCache]: Analyzing trace with hash -46491613, now seen corresponding path program 5 times [2024-06-03 20:34:39,794 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:39,794 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [566614922] [2024-06-03 20:34:39,794 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:39,794 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:39,801 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:40,112 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:40,113 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:40,113 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [566614922] [2024-06-03 20:34:40,113 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [566614922] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:40,113 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:40,113 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:40,113 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1567666782] [2024-06-03 20:34:40,113 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:40,113 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:40,114 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:40,114 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:40,114 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:40,186 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:40,187 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) [2024-06-03 20:34:40,187 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:40,187 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:40,187 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:40,799 INFO L124 PetriNetUnfolderBase]: 2363/3951 cut-off events. [2024-06-03 20:34:40,799 INFO L125 PetriNetUnfolderBase]: For 303383/303383 co-relation queries the response was YES. [2024-06-03 20:34:40,836 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. [2024-06-03 20:34:40,851 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 352 selfloop transitions, 50 changer transitions 0/408 dead transitions. [2024-06-03 20:34:40,852 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 288 places, 408 transitions, 6724 flow [2024-06-03 20:34:40,852 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:40,852 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:40,852 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 20:34:40,852 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-03 20:34:40,853 INFO L175 Difference]: Start difference. First operand has 281 places, 385 transitions, 5820 flow. Second operand 8 states and 174 transitions. [2024-06-03 20:34:40,853 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 288 places, 408 transitions, 6724 flow [2024-06-03 20:34:41,840 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 282 places, 408 transitions, 6619 flow, removed 5 selfloop flow, removed 6 redundant places. [2024-06-03 20:34:41,845 INFO L231 Difference]: Finished difference. Result has 283 places, 386 transitions, 5842 flow [2024-06-03 20:34:41,846 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} [2024-06-03 20:34:41,846 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 241 predicate places. [2024-06-03 20:34:41,846 INFO L495 AbstractCegarLoop]: Abstraction has has 283 places, 386 transitions, 5842 flow [2024-06-03 20:34:41,846 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) [2024-06-03 20:34:41,846 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:41,846 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:41,846 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable80 [2024-06-03 20:34:41,847 INFO L420 AbstractCegarLoop]: === Iteration 82 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:41,847 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:41,847 INFO L85 PathProgramCache]: Analyzing trace with hash 1107391183, now seen corresponding path program 6 times [2024-06-03 20:34:41,847 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:41,847 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [785949202] [2024-06-03 20:34:41,847 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:41,847 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:41,854 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:42,191 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:42,192 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:42,192 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [785949202] [2024-06-03 20:34:42,192 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [785949202] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:42,192 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:42,192 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:42,192 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [666920288] [2024-06-03 20:34:42,192 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:42,192 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:42,193 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:42,193 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:42,193 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:42,242 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:42,242 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) [2024-06-03 20:34:42,242 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:42,242 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:42,242 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:42,891 INFO L124 PetriNetUnfolderBase]: 2383/3981 cut-off events. [2024-06-03 20:34:42,891 INFO L125 PetriNetUnfolderBase]: For 306965/306965 co-relation queries the response was YES. [2024-06-03 20:34:42,923 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. [2024-06-03 20:34:42,938 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 354 selfloop transitions, 52 changer transitions 0/412 dead transitions. [2024-06-03 20:34:42,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 290 places, 412 transitions, 6774 flow [2024-06-03 20:34:42,939 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:42,939 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:42,939 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 177 transitions. [2024-06-03 20:34:42,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5396341463414634 [2024-06-03 20:34:42,939 INFO L175 Difference]: Start difference. First operand has 283 places, 386 transitions, 5842 flow. Second operand 8 states and 177 transitions. [2024-06-03 20:34:42,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 290 places, 412 transitions, 6774 flow [2024-06-03 20:34:43,855 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 284 places, 412 transitions, 6665 flow, removed 6 selfloop flow, removed 6 redundant places. [2024-06-03 20:34:43,860 INFO L231 Difference]: Finished difference. Result has 285 places, 387 transitions, 5865 flow [2024-06-03 20:34:43,861 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} [2024-06-03 20:34:43,861 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 243 predicate places. [2024-06-03 20:34:43,861 INFO L495 AbstractCegarLoop]: Abstraction has has 285 places, 387 transitions, 5865 flow [2024-06-03 20:34:43,861 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) [2024-06-03 20:34:43,861 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:43,861 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] [2024-06-03 20:34:43,861 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable81 [2024-06-03 20:34:43,862 INFO L420 AbstractCegarLoop]: === Iteration 83 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:43,862 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:43,862 INFO L85 PathProgramCache]: Analyzing trace with hash -1253853507, now seen corresponding path program 4 times [2024-06-03 20:34:43,862 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:43,862 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1844794551] [2024-06-03 20:34:43,862 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:43,862 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:43,869 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:44,155 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:44,156 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:44,156 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1844794551] [2024-06-03 20:34:44,156 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1844794551] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:44,156 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:44,156 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:44,156 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2041931299] [2024-06-03 20:34:44,156 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:44,157 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:44,157 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:44,157 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:44,157 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:44,192 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:44,192 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) [2024-06-03 20:34:44,192 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:44,192 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:44,193 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:44,848 INFO L124 PetriNetUnfolderBase]: 2412/4033 cut-off events. [2024-06-03 20:34:44,848 INFO L125 PetriNetUnfolderBase]: For 313036/313053 co-relation queries the response was YES. [2024-06-03 20:34:44,880 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. [2024-06-03 20:34:44,893 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 288 selfloop transitions, 135 changer transitions 0/429 dead transitions. [2024-06-03 20:34:44,894 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 292 places, 429 transitions, 7358 flow [2024-06-03 20:34:44,894 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:44,894 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:44,894 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 20:34:44,895 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-03 20:34:44,895 INFO L175 Difference]: Start difference. First operand has 285 places, 387 transitions, 5865 flow. Second operand 8 states and 188 transitions. [2024-06-03 20:34:44,895 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 292 places, 429 transitions, 7358 flow [2024-06-03 20:34:45,671 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 286 places, 429 transitions, 7240 flow, removed 8 selfloop flow, removed 6 redundant places. [2024-06-03 20:34:45,676 INFO L231 Difference]: Finished difference. Result has 287 places, 399 transitions, 6177 flow [2024-06-03 20:34:45,676 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} [2024-06-03 20:34:45,677 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 245 predicate places. [2024-06-03 20:34:45,677 INFO L495 AbstractCegarLoop]: Abstraction has has 287 places, 399 transitions, 6177 flow [2024-06-03 20:34:45,677 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) [2024-06-03 20:34:45,677 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:45,677 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:45,677 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable82 [2024-06-03 20:34:45,677 INFO L420 AbstractCegarLoop]: === Iteration 84 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:45,678 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:45,678 INFO L85 PathProgramCache]: Analyzing trace with hash 521657217, now seen corresponding path program 5 times [2024-06-03 20:34:45,678 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:45,678 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [191439535] [2024-06-03 20:34:45,678 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:45,678 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:45,684 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:46,009 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:46,010 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:46,010 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [191439535] [2024-06-03 20:34:46,010 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [191439535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:46,010 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:46,010 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:34:46,010 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1076398317] [2024-06-03 20:34:46,010 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:46,010 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:34:46,011 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:46,011 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:34:46,011 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:34:46,080 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:46,080 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) [2024-06-03 20:34:46,080 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:46,080 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:46,081 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:46,795 INFO L124 PetriNetUnfolderBase]: 2425/4050 cut-off events. [2024-06-03 20:34:46,796 INFO L125 PetriNetUnfolderBase]: For 321590/321596 co-relation queries the response was YES. [2024-06-03 20:34:46,827 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. [2024-06-03 20:34:46,841 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 285 selfloop transitions, 149 changer transitions 0/440 dead transitions. [2024-06-03 20:34:46,842 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 296 places, 440 transitions, 7635 flow [2024-06-03 20:34:46,842 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:34:46,842 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:34:46,843 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-03 20:34:46,843 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-03 20:34:46,843 INFO L175 Difference]: Start difference. First operand has 287 places, 399 transitions, 6177 flow. Second operand 10 states and 226 transitions. [2024-06-03 20:34:46,843 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 296 places, 440 transitions, 7635 flow [2024-06-03 20:34:48,180 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 291 places, 440 transitions, 7343 flow, removed 7 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:48,186 INFO L231 Difference]: Finished difference. Result has 292 places, 405 transitions, 6267 flow [2024-06-03 20:34:48,186 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} [2024-06-03 20:34:48,187 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 250 predicate places. [2024-06-03 20:34:48,187 INFO L495 AbstractCegarLoop]: Abstraction has has 292 places, 405 transitions, 6267 flow [2024-06-03 20:34:48,187 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) [2024-06-03 20:34:48,187 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:48,187 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:48,187 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable83 [2024-06-03 20:34:48,187 INFO L420 AbstractCegarLoop]: === Iteration 85 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:48,188 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:48,188 INFO L85 PathProgramCache]: Analyzing trace with hash 1619901777, now seen corresponding path program 6 times [2024-06-03 20:34:48,188 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:48,188 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [49739351] [2024-06-03 20:34:48,188 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:48,188 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:48,194 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:48,480 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:48,480 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:48,480 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [49739351] [2024-06-03 20:34:48,480 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [49739351] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:48,480 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:48,480 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:34:48,481 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2079664071] [2024-06-03 20:34:48,481 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:48,481 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:34:48,481 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:48,481 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:34:48,481 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:34:48,518 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:48,518 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) [2024-06-03 20:34:48,518 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:48,518 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:48,519 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:49,163 INFO L124 PetriNetUnfolderBase]: 2422/4049 cut-off events. [2024-06-03 20:34:49,163 INFO L125 PetriNetUnfolderBase]: For 330020/330031 co-relation queries the response was YES. [2024-06-03 20:34:49,195 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. [2024-06-03 20:34:49,209 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 291 selfloop transitions, 129 changer transitions 0/426 dead transitions. [2024-06-03 20:34:49,210 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 297 places, 426 transitions, 7447 flow [2024-06-03 20:34:49,210 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:34:49,210 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:34:49,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 144 transitions. [2024-06-03 20:34:49,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:34:49,211 INFO L175 Difference]: Start difference. First operand has 292 places, 405 transitions, 6267 flow. Second operand 6 states and 144 transitions. [2024-06-03 20:34:49,211 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 297 places, 426 transitions, 7447 flow [2024-06-03 20:34:50,286 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 292 places, 426 transitions, 7191 flow, removed 14 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:50,292 INFO L231 Difference]: Finished difference. Result has 293 places, 405 transitions, 6276 flow [2024-06-03 20:34:50,292 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} [2024-06-03 20:34:50,292 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 251 predicate places. [2024-06-03 20:34:50,292 INFO L495 AbstractCegarLoop]: Abstraction has has 293 places, 405 transitions, 6276 flow [2024-06-03 20:34:50,293 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) [2024-06-03 20:34:50,293 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:50,293 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:50,293 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable84 [2024-06-03 20:34:50,293 INFO L420 AbstractCegarLoop]: === Iteration 86 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:50,293 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:50,293 INFO L85 PathProgramCache]: Analyzing trace with hash 516116463, now seen corresponding path program 4 times [2024-06-03 20:34:50,294 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:50,294 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1261563579] [2024-06-03 20:34:50,294 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:50,294 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:50,301 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:50,609 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:50,609 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:50,609 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1261563579] [2024-06-03 20:34:50,609 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1261563579] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:50,609 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:50,610 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:50,610 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [710817816] [2024-06-03 20:34:50,610 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:50,610 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:50,610 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:50,610 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:50,610 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:50,649 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:50,649 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) [2024-06-03 20:34:50,650 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:50,650 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:50,650 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:51,348 INFO L124 PetriNetUnfolderBase]: 2445/4078 cut-off events. [2024-06-03 20:34:51,348 INFO L125 PetriNetUnfolderBase]: For 339807/339807 co-relation queries the response was YES. [2024-06-03 20:34:51,382 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. [2024-06-03 20:34:51,397 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 310 selfloop transitions, 128 changer transitions 0/444 dead transitions. [2024-06-03 20:34:51,397 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 300 places, 444 transitions, 7831 flow [2024-06-03 20:34:51,397 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:51,398 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:51,398 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 187 transitions. [2024-06-03 20:34:51,398 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5701219512195121 [2024-06-03 20:34:51,398 INFO L175 Difference]: Start difference. First operand has 293 places, 405 transitions, 6276 flow. Second operand 8 states and 187 transitions. [2024-06-03 20:34:51,398 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 300 places, 444 transitions, 7831 flow [2024-06-03 20:34:52,471 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 295 places, 444 transitions, 7567 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 20:34:52,477 INFO L231 Difference]: Finished difference. Result has 297 places, 417 transitions, 6483 flow [2024-06-03 20:34:52,477 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} [2024-06-03 20:34:52,478 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 255 predicate places. [2024-06-03 20:34:52,478 INFO L495 AbstractCegarLoop]: Abstraction has has 297 places, 417 transitions, 6483 flow [2024-06-03 20:34:52,478 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) [2024-06-03 20:34:52,478 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:52,478 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:52,478 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable85 [2024-06-03 20:34:52,478 INFO L420 AbstractCegarLoop]: === Iteration 87 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:52,479 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:52,479 INFO L85 PathProgramCache]: Analyzing trace with hash -253350583, now seen corresponding path program 7 times [2024-06-03 20:34:52,479 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:52,479 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [740336146] [2024-06-03 20:34:52,479 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:52,479 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:52,486 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:52,807 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:52,808 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:52,808 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [740336146] [2024-06-03 20:34:52,808 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [740336146] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:52,808 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:52,808 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:52,808 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1275849004] [2024-06-03 20:34:52,808 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:52,808 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:52,809 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:52,809 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:52,809 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:52,865 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:52,866 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) [2024-06-03 20:34:52,866 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:52,866 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:52,866 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:53,587 INFO L124 PetriNetUnfolderBase]: 2450/4089 cut-off events. [2024-06-03 20:34:53,587 INFO L125 PetriNetUnfolderBase]: For 348084/348084 co-relation queries the response was YES. [2024-06-03 20:34:53,621 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. [2024-06-03 20:34:53,635 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 357 selfloop transitions, 81 changer transitions 0/444 dead transitions. [2024-06-03 20:34:53,635 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 304 places, 444 transitions, 7445 flow [2024-06-03 20:34:53,636 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:53,636 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:53,636 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 20:34:53,636 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 20:34:53,636 INFO L175 Difference]: Start difference. First operand has 297 places, 417 transitions, 6483 flow. Second operand 8 states and 180 transitions. [2024-06-03 20:34:53,636 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 304 places, 444 transitions, 7445 flow [2024-06-03 20:34:54,580 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 301 places, 444 transitions, 7248 flow, removed 23 selfloop flow, removed 3 redundant places. [2024-06-03 20:34:54,585 INFO L231 Difference]: Finished difference. Result has 302 places, 420 transitions, 6486 flow [2024-06-03 20:34:54,586 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} [2024-06-03 20:34:54,586 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 260 predicate places. [2024-06-03 20:34:54,586 INFO L495 AbstractCegarLoop]: Abstraction has has 302 places, 420 transitions, 6486 flow [2024-06-03 20:34:54,586 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) [2024-06-03 20:34:54,586 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:54,586 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:54,587 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable86 [2024-06-03 20:34:54,587 INFO L420 AbstractCegarLoop]: === Iteration 88 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:54,587 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:54,587 INFO L85 PathProgramCache]: Analyzing trace with hash 82560687, now seen corresponding path program 1 times [2024-06-03 20:34:54,587 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:54,587 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [138603985] [2024-06-03 20:34:54,587 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:54,587 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:54,594 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:54,892 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:54,892 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:54,892 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [138603985] [2024-06-03 20:34:54,892 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [138603985] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:54,892 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:54,892 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:54,893 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1885128485] [2024-06-03 20:34:54,893 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:54,893 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:54,893 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:54,893 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:54,893 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:54,931 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:54,931 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) [2024-06-03 20:34:54,931 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:54,931 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:54,931 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:55,631 INFO L124 PetriNetUnfolderBase]: 2468/4116 cut-off events. [2024-06-03 20:34:55,631 INFO L125 PetriNetUnfolderBase]: For 359436/359436 co-relation queries the response was YES. [2024-06-03 20:34:55,667 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. [2024-06-03 20:34:55,766 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 329 selfloop transitions, 118 changer transitions 0/453 dead transitions. [2024-06-03 20:34:55,767 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 309 places, 453 transitions, 8014 flow [2024-06-03 20:34:55,767 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:34:55,767 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:34:55,767 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-03 20:34:55,767 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:34:55,768 INFO L175 Difference]: Start difference. First operand has 302 places, 420 transitions, 6486 flow. Second operand 8 states and 184 transitions. [2024-06-03 20:34:55,768 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 309 places, 453 transitions, 8014 flow [2024-06-03 20:34:57,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 303 places, 453 transitions, 7852 flow, removed 2 selfloop flow, removed 6 redundant places. [2024-06-03 20:34:57,041 INFO L231 Difference]: Finished difference. Result has 304 places, 429 transitions, 6692 flow [2024-06-03 20:34:57,042 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} [2024-06-03 20:34:57,042 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 262 predicate places. [2024-06-03 20:34:57,042 INFO L495 AbstractCegarLoop]: Abstraction has has 304 places, 429 transitions, 6692 flow [2024-06-03 20:34:57,042 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) [2024-06-03 20:34:57,042 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:57,042 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:57,042 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable87 [2024-06-03 20:34:57,043 INFO L420 AbstractCegarLoop]: === Iteration 89 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:57,043 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:57,043 INFO L85 PathProgramCache]: Analyzing trace with hash 1629160857, now seen corresponding path program 8 times [2024-06-03 20:34:57,043 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:57,043 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [98477863] [2024-06-03 20:34:57,043 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:57,043 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:57,050 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:57,354 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:57,354 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:57,354 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [98477863] [2024-06-03 20:34:57,354 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [98477863] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:57,355 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:57,355 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:57,355 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1698140185] [2024-06-03 20:34:57,355 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:57,355 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:57,355 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:57,355 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:57,356 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:34:57,411 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:34:57,412 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) [2024-06-03 20:34:57,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:34:57,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:34:57,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:34:58,162 INFO L124 PetriNetUnfolderBase]: 2481/4137 cut-off events. [2024-06-03 20:34:58,162 INFO L125 PetriNetUnfolderBase]: For 371403/371403 co-relation queries the response was YES. [2024-06-03 20:34:58,197 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. [2024-06-03 20:34:58,212 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 371 selfloop transitions, 88 changer transitions 0/465 dead transitions. [2024-06-03 20:34:58,213 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 316 places, 465 transitions, 7906 flow [2024-06-03 20:34:58,213 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:34:58,213 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:34:58,214 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 266 transitions. [2024-06-03 20:34:58,214 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49906191369606 [2024-06-03 20:34:58,214 INFO L175 Difference]: Start difference. First operand has 304 places, 429 transitions, 6692 flow. Second operand 13 states and 266 transitions. [2024-06-03 20:34:58,214 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 316 places, 465 transitions, 7906 flow [2024-06-03 20:34:59,649 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 313 places, 465 transitions, 7692 flow, removed 24 selfloop flow, removed 3 redundant places. [2024-06-03 20:34:59,655 INFO L231 Difference]: Finished difference. Result has 315 places, 435 transitions, 6748 flow [2024-06-03 20:34:59,656 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} [2024-06-03 20:34:59,656 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-03 20:34:59,656 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 435 transitions, 6748 flow [2024-06-03 20:34:59,656 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) [2024-06-03 20:34:59,656 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:34:59,656 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:34:59,657 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable88 [2024-06-03 20:34:59,657 INFO L420 AbstractCegarLoop]: === Iteration 90 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:34:59,657 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:34:59,657 INFO L85 PathProgramCache]: Analyzing trace with hash -1249841301, now seen corresponding path program 5 times [2024-06-03 20:34:59,657 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:34:59,657 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [375811767] [2024-06-03 20:34:59,657 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:34:59,657 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:34:59,664 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:34:59,969 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:34:59,969 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:34:59,969 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [375811767] [2024-06-03 20:34:59,969 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [375811767] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:34:59,970 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:34:59,970 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:34:59,970 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [399548793] [2024-06-03 20:34:59,970 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:34:59,970 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:34:59,970 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:34:59,970 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:34:59,971 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:00,003 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:00,004 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) [2024-06-03 20:35:00,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:00,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:00,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:00,867 INFO L124 PetriNetUnfolderBase]: 2494/4161 cut-off events. [2024-06-03 20:35:00,867 INFO L125 PetriNetUnfolderBase]: For 384688/384688 co-relation queries the response was YES. [2024-06-03 20:35:00,905 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. [2024-06-03 20:35:00,922 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 321 selfloop transitions, 144 changer transitions 0/471 dead transitions. [2024-06-03 20:35:00,922 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 324 places, 471 transitions, 8494 flow [2024-06-03 20:35:00,922 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:35:00,922 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:35:00,923 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 225 transitions. [2024-06-03 20:35:00,923 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 20:35:00,923 INFO L175 Difference]: Start difference. First operand has 315 places, 435 transitions, 6748 flow. Second operand 10 states and 225 transitions. [2024-06-03 20:35:00,923 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 324 places, 471 transitions, 8494 flow [2024-06-03 20:35:02,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 314 places, 471 transitions, 8302 flow, removed 12 selfloop flow, removed 10 redundant places. [2024-06-03 20:35:02,328 INFO L231 Difference]: Finished difference. Result has 315 places, 441 transitions, 6978 flow [2024-06-03 20:35:02,329 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} [2024-06-03 20:35:02,329 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 273 predicate places. [2024-06-03 20:35:02,329 INFO L495 AbstractCegarLoop]: Abstraction has has 315 places, 441 transitions, 6978 flow [2024-06-03 20:35:02,329 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) [2024-06-03 20:35:02,329 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:02,329 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:02,330 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable89 [2024-06-03 20:35:02,330 INFO L420 AbstractCegarLoop]: === Iteration 91 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:02,330 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:02,330 INFO L85 PathProgramCache]: Analyzing trace with hash 82560315, now seen corresponding path program 9 times [2024-06-03 20:35:02,330 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:02,330 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1005764193] [2024-06-03 20:35:02,330 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:02,330 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:02,337 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:02,640 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:02,640 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:02,640 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1005764193] [2024-06-03 20:35:02,640 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1005764193] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:02,641 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:02,641 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:02,641 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [235544027] [2024-06-03 20:35:02,641 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:02,641 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:02,641 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:02,641 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:02,642 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:02,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:02,695 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) [2024-06-03 20:35:02,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:02,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:02,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:03,433 INFO L124 PetriNetUnfolderBase]: 2491/4157 cut-off events. [2024-06-03 20:35:03,434 INFO L125 PetriNetUnfolderBase]: For 390954/390954 co-relation queries the response was YES. [2024-06-03 20:35:03,469 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. [2024-06-03 20:35:03,484 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 374 selfloop transitions, 88 changer transitions 0/468 dead transitions. [2024-06-03 20:35:03,484 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 325 places, 468 transitions, 7968 flow [2024-06-03 20:35:03,484 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:35:03,484 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:35:03,485 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-03 20:35:03,485 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 20:35:03,485 INFO L175 Difference]: Start difference. First operand has 315 places, 441 transitions, 6978 flow. Second operand 11 states and 231 transitions. [2024-06-03 20:35:03,485 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 325 places, 468 transitions, 7968 flow [2024-06-03 20:35:04,999 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 468 transitions, 7626 flow, removed 28 selfloop flow, removed 7 redundant places. [2024-06-03 20:35:05,005 INFO L231 Difference]: Finished difference. Result has 319 places, 441 transitions, 6818 flow [2024-06-03 20:35:05,005 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} [2024-06-03 20:35:05,005 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-03 20:35:05,006 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 441 transitions, 6818 flow [2024-06-03 20:35:05,006 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) [2024-06-03 20:35:05,006 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:05,006 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:05,006 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable90 [2024-06-03 20:35:05,006 INFO L420 AbstractCegarLoop]: === Iteration 92 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:05,007 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:05,007 INFO L85 PathProgramCache]: Analyzing trace with hash 1629172203, now seen corresponding path program 6 times [2024-06-03 20:35:05,007 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:05,007 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2099373780] [2024-06-03 20:35:05,007 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:05,007 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:05,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:05,300 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:05,301 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:05,301 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2099373780] [2024-06-03 20:35:05,301 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2099373780] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:05,301 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:05,301 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:05,301 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [152482977] [2024-06-03 20:35:05,301 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:05,302 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:05,302 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:05,302 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:05,302 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:05,366 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:05,367 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) [2024-06-03 20:35:05,367 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:05,367 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:05,367 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:06,091 INFO L124 PetriNetUnfolderBase]: 2488/4154 cut-off events. [2024-06-03 20:35:06,092 INFO L125 PetriNetUnfolderBase]: For 395927/395927 co-relation queries the response was YES. [2024-06-03 20:35:06,129 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. [2024-06-03 20:35:06,144 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 319 selfloop transitions, 146 changer transitions 0/471 dead transitions. [2024-06-03 20:35:06,145 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 329 places, 471 transitions, 8294 flow [2024-06-03 20:35:06,145 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:35:06,145 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:35:06,146 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-03 20:35:06,146 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277161862527716 [2024-06-03 20:35:06,146 INFO L175 Difference]: Start difference. First operand has 319 places, 441 transitions, 6818 flow. Second operand 11 states and 238 transitions. [2024-06-03 20:35:06,146 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 329 places, 471 transitions, 8294 flow [2024-06-03 20:35:07,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 320 places, 471 transitions, 8123 flow, removed 12 selfloop flow, removed 9 redundant places. [2024-06-03 20:35:07,527 INFO L231 Difference]: Finished difference. Result has 321 places, 441 transitions, 6945 flow [2024-06-03 20:35:07,527 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} [2024-06-03 20:35:07,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 279 predicate places. [2024-06-03 20:35:07,527 INFO L495 AbstractCegarLoop]: Abstraction has has 321 places, 441 transitions, 6945 flow [2024-06-03 20:35:07,527 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) [2024-06-03 20:35:07,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:07,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:07,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable91 [2024-06-03 20:35:07,528 INFO L420 AbstractCegarLoop]: === Iteration 93 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:07,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:07,528 INFO L85 PathProgramCache]: Analyzing trace with hash 428261335, now seen corresponding path program 2 times [2024-06-03 20:35:07,528 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:07,528 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1340442796] [2024-06-03 20:35:07,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:07,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:07,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:07,854 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:07,855 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:07,855 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1340442796] [2024-06-03 20:35:07,855 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1340442796] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:07,855 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:07,855 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:07,855 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1388814174] [2024-06-03 20:35:07,855 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:07,855 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:07,856 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:07,856 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:07,856 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:07,890 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:07,891 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) [2024-06-03 20:35:07,891 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:07,891 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:07,891 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:08,665 INFO L124 PetriNetUnfolderBase]: 2485/4149 cut-off events. [2024-06-03 20:35:08,665 INFO L125 PetriNetUnfolderBase]: For 402537/402537 co-relation queries the response was YES. [2024-06-03 20:35:08,700 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. [2024-06-03 20:35:08,715 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 340 selfloop transitions, 118 changer transitions 0/464 dead transitions. [2024-06-03 20:35:08,715 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 464 transitions, 8237 flow [2024-06-03 20:35:08,716 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:08,716 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:08,716 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 181 transitions. [2024-06-03 20:35:08,716 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551829268292683 [2024-06-03 20:35:08,716 INFO L175 Difference]: Start difference. First operand has 321 places, 441 transitions, 6945 flow. Second operand 8 states and 181 transitions. [2024-06-03 20:35:08,716 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 464 transitions, 8237 flow [2024-06-03 20:35:09,949 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 318 places, 464 transitions, 7927 flow, removed 6 selfloop flow, removed 10 redundant places. [2024-06-03 20:35:09,955 INFO L231 Difference]: Finished difference. Result has 319 places, 441 transitions, 6877 flow [2024-06-03 20:35:09,955 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} [2024-06-03 20:35:09,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 277 predicate places. [2024-06-03 20:35:09,956 INFO L495 AbstractCegarLoop]: Abstraction has has 319 places, 441 transitions, 6877 flow [2024-06-03 20:35:09,956 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) [2024-06-03 20:35:09,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:09,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:09,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable92 [2024-06-03 20:35:09,956 INFO L420 AbstractCegarLoop]: === Iteration 94 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:09,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:09,957 INFO L85 PathProgramCache]: Analyzing trace with hash -53731663, now seen corresponding path program 10 times [2024-06-03 20:35:09,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:09,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [345681275] [2024-06-03 20:35:09,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:09,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:09,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:10,288 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:10,288 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:10,288 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [345681275] [2024-06-03 20:35:10,289 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [345681275] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:10,289 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:10,289 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:10,289 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [762179953] [2024-06-03 20:35:10,289 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:10,289 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:10,289 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:10,289 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:10,290 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:10,336 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:10,336 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) [2024-06-03 20:35:10,336 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:10,337 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:10,337 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:11,054 INFO L124 PetriNetUnfolderBase]: 2498/4175 cut-off events. [2024-06-03 20:35:11,055 INFO L125 PetriNetUnfolderBase]: For 414709/414709 co-relation queries the response was YES. [2024-06-03 20:35:11,092 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. [2024-06-03 20:35:11,108 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 389 selfloop transitions, 73 changer transitions 0/468 dead transitions. [2024-06-03 20:35:11,108 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 328 places, 468 transitions, 8097 flow [2024-06-03 20:35:11,108 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:35:11,108 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:35:11,109 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 210 transitions. [2024-06-03 20:35:11,109 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 20:35:11,109 INFO L175 Difference]: Start difference. First operand has 319 places, 441 transitions, 6877 flow. Second operand 10 states and 210 transitions. [2024-06-03 20:35:11,109 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 328 places, 468 transitions, 8097 flow [2024-06-03 20:35:12,350 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 321 places, 468 transitions, 7853 flow, removed 2 selfloop flow, removed 7 redundant places. [2024-06-03 20:35:12,356 INFO L231 Difference]: Finished difference. Result has 323 places, 447 transitions, 6889 flow [2024-06-03 20:35:12,356 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} [2024-06-03 20:35:12,357 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 281 predicate places. [2024-06-03 20:35:12,357 INFO L495 AbstractCegarLoop]: Abstraction has has 323 places, 447 transitions, 6889 flow [2024-06-03 20:35:12,357 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) [2024-06-03 20:35:12,357 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:12,357 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:12,357 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable93 [2024-06-03 20:35:12,357 INFO L420 AbstractCegarLoop]: === Iteration 95 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:12,357 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:12,358 INFO L85 PathProgramCache]: Analyzing trace with hash -53731477, now seen corresponding path program 7 times [2024-06-03 20:35:12,358 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:12,358 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [393079588] [2024-06-03 20:35:12,358 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:12,358 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:12,364 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:12,664 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:12,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:12,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [393079588] [2024-06-03 20:35:12,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [393079588] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:12,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:12,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:12,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [193913014] [2024-06-03 20:35:12,665 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:12,665 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:12,665 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:12,665 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:12,665 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:12,705 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:12,705 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) [2024-06-03 20:35:12,705 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:12,705 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:12,705 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:13,460 INFO L124 PetriNetUnfolderBase]: 2511/4195 cut-off events. [2024-06-03 20:35:13,460 INFO L125 PetriNetUnfolderBase]: For 427860/427860 co-relation queries the response was YES. [2024-06-03 20:35:13,502 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. [2024-06-03 20:35:13,518 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 344 selfloop transitions, 124 changer transitions 0/474 dead transitions. [2024-06-03 20:35:13,519 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 330 places, 474 transitions, 8495 flow [2024-06-03 20:35:13,519 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:13,519 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:13,520 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 182 transitions. [2024-06-03 20:35:13,520 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5548780487804879 [2024-06-03 20:35:13,520 INFO L175 Difference]: Start difference. First operand has 323 places, 447 transitions, 6889 flow. Second operand 8 states and 182 transitions. [2024-06-03 20:35:13,520 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 330 places, 474 transitions, 8495 flow [2024-06-03 20:35:14,847 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 323 places, 474 transitions, 8325 flow, removed 18 selfloop flow, removed 7 redundant places. [2024-06-03 20:35:14,853 INFO L231 Difference]: Finished difference. Result has 324 places, 453 transitions, 7107 flow [2024-06-03 20:35:14,854 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} [2024-06-03 20:35:14,854 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 282 predicate places. [2024-06-03 20:35:14,854 INFO L495 AbstractCegarLoop]: Abstraction has has 324 places, 453 transitions, 7107 flow [2024-06-03 20:35:14,854 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) [2024-06-03 20:35:14,854 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:14,854 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] [2024-06-03 20:35:14,854 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable94 [2024-06-03 20:35:14,855 INFO L420 AbstractCegarLoop]: === Iteration 96 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:14,855 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:14,855 INFO L85 PathProgramCache]: Analyzing trace with hash -1492740805, now seen corresponding path program 11 times [2024-06-03 20:35:14,855 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:14,855 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1601543016] [2024-06-03 20:35:14,855 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:14,855 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:14,862 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:15,167 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:15,168 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:15,168 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1601543016] [2024-06-03 20:35:15,168 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1601543016] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:15,169 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:15,169 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:15,169 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1129699762] [2024-06-03 20:35:15,169 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:15,169 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:15,169 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:15,170 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:15,170 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:15,217 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:15,217 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) [2024-06-03 20:35:15,217 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:15,217 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:15,217 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:15,979 INFO L124 PetriNetUnfolderBase]: 2508/4193 cut-off events. [2024-06-03 20:35:15,979 INFO L125 PetriNetUnfolderBase]: For 434270/434270 co-relation queries the response was YES. [2024-06-03 20:35:16,017 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. [2024-06-03 20:35:16,033 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 395 selfloop transitions, 73 changer transitions 0/474 dead transitions. [2024-06-03 20:35:16,033 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 334 places, 474 transitions, 8093 flow [2024-06-03 20:35:16,033 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:35:16,033 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:35:16,034 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 225 transitions. [2024-06-03 20:35:16,034 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.49889135254988914 [2024-06-03 20:35:16,034 INFO L175 Difference]: Start difference. First operand has 324 places, 453 transitions, 7107 flow. Second operand 11 states and 225 transitions. [2024-06-03 20:35:16,034 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 334 places, 474 transitions, 8093 flow [2024-06-03 20:35:17,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 332 places, 474 transitions, 7918 flow, removed 28 selfloop flow, removed 2 redundant places. [2024-06-03 20:35:17,759 INFO L231 Difference]: Finished difference. Result has 333 places, 453 transitions, 7084 flow [2024-06-03 20:35:17,760 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} [2024-06-03 20:35:17,760 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 291 predicate places. [2024-06-03 20:35:17,760 INFO L495 AbstractCegarLoop]: Abstraction has has 333 places, 453 transitions, 7084 flow [2024-06-03 20:35:17,760 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) [2024-06-03 20:35:17,760 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:17,760 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:17,760 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable95 [2024-06-03 20:35:17,761 INFO L420 AbstractCegarLoop]: === Iteration 97 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:17,761 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:17,761 INFO L85 PathProgramCache]: Analyzing trace with hash -399183423, now seen corresponding path program 8 times [2024-06-03 20:35:17,761 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:17,761 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1122008912] [2024-06-03 20:35:17,761 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:17,761 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:17,768 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:18,049 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:18,050 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:18,050 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1122008912] [2024-06-03 20:35:18,050 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1122008912] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:18,050 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:18,050 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:18,050 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1543478874] [2024-06-03 20:35:18,050 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:18,050 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:18,050 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:18,051 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:18,051 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:18,099 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:18,099 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) [2024-06-03 20:35:18,099 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:18,099 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:18,099 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:18,845 INFO L124 PetriNetUnfolderBase]: 2553/4245 cut-off events. [2024-06-03 20:35:18,846 INFO L125 PetriNetUnfolderBase]: For 463358/463358 co-relation queries the response was YES. [2024-06-03 20:35:18,885 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. [2024-06-03 20:35:18,901 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 212 selfloop transitions, 271 changer transitions 0/489 dead transitions. [2024-06-03 20:35:18,901 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 340 places, 489 transitions, 9062 flow [2024-06-03 20:35:18,902 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:18,902 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:18,902 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 20:35:18,902 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-03 20:35:18,902 INFO L175 Difference]: Start difference. First operand has 333 places, 453 transitions, 7084 flow. Second operand 8 states and 188 transitions. [2024-06-03 20:35:18,902 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 340 places, 489 transitions, 9062 flow [2024-06-03 20:35:20,384 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 331 places, 489 transitions, 8937 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 20:35:20,390 INFO L231 Difference]: Finished difference. Result has 332 places, 467 transitions, 7795 flow [2024-06-03 20:35:20,391 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} [2024-06-03 20:35:20,391 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 290 predicate places. [2024-06-03 20:35:20,391 INFO L495 AbstractCegarLoop]: Abstraction has has 332 places, 467 transitions, 7795 flow [2024-06-03 20:35:20,391 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) [2024-06-03 20:35:20,391 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:20,391 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:20,391 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable96 [2024-06-03 20:35:20,392 INFO L420 AbstractCegarLoop]: === Iteration 98 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:20,392 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:20,392 INFO L85 PathProgramCache]: Analyzing trace with hash 248395121, now seen corresponding path program 3 times [2024-06-03 20:35:20,392 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:20,392 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145437643] [2024-06-03 20:35:20,392 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:20,392 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:20,399 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:20,707 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:20,707 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:20,707 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145437643] [2024-06-03 20:35:20,707 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145437643] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:20,708 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:20,708 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:20,708 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1954632100] [2024-06-03 20:35:20,708 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:20,708 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:20,708 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:20,708 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:20,709 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:20,755 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:20,755 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) [2024-06-03 20:35:20,755 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:20,755 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:20,756 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:21,612 INFO L124 PetriNetUnfolderBase]: 2563/4280 cut-off events. [2024-06-03 20:35:21,613 INFO L125 PetriNetUnfolderBase]: For 476696/476696 co-relation queries the response was YES. [2024-06-03 20:35:21,670 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. [2024-06-03 20:35:21,690 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 365 selfloop transitions, 122 changer transitions 0/493 dead transitions. [2024-06-03 20:35:21,691 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 339 places, 493 transitions, 9256 flow [2024-06-03 20:35:21,691 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:21,691 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:21,701 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 20:35:21,702 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 20:35:21,702 INFO L175 Difference]: Start difference. First operand has 332 places, 467 transitions, 7795 flow. Second operand 8 states and 180 transitions. [2024-06-03 20:35:21,702 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 339 places, 493 transitions, 9256 flow [2024-06-03 20:35:23,520 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 336 places, 493 transitions, 8758 flow, removed 58 selfloop flow, removed 3 redundant places. [2024-06-03 20:35:23,527 INFO L231 Difference]: Finished difference. Result has 337 places, 473 transitions, 7646 flow [2024-06-03 20:35:23,527 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} [2024-06-03 20:35:23,527 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 295 predicate places. [2024-06-03 20:35:23,528 INFO L495 AbstractCegarLoop]: Abstraction has has 337 places, 473 transitions, 7646 flow [2024-06-03 20:35:23,528 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) [2024-06-03 20:35:23,528 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:23,528 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:23,528 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable97 [2024-06-03 20:35:23,528 INFO L420 AbstractCegarLoop]: === Iteration 99 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:23,528 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:23,528 INFO L85 PathProgramCache]: Analyzing trace with hash -57450733, now seen corresponding path program 12 times [2024-06-03 20:35:23,529 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:23,529 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [530734891] [2024-06-03 20:35:23,529 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:23,529 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:23,535 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:23,827 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:23,828 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:23,828 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [530734891] [2024-06-03 20:35:23,828 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [530734891] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:23,828 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:23,828 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:23,828 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [929912643] [2024-06-03 20:35:23,828 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:23,829 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:23,829 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:23,829 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:23,829 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:23,871 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:23,872 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) [2024-06-03 20:35:23,872 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:23,872 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:23,872 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:24,695 INFO L124 PetriNetUnfolderBase]: 2560/4274 cut-off events. [2024-06-03 20:35:24,695 INFO L125 PetriNetUnfolderBase]: For 481696/481696 co-relation queries the response was YES. [2024-06-03 20:35:24,737 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. [2024-06-03 20:35:24,754 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 310 selfloop transitions, 181 changer transitions 0/497 dead transitions. [2024-06-03 20:35:24,754 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 346 places, 497 transitions, 9372 flow [2024-06-03 20:35:24,754 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:35:24,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:35:24,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 218 transitions. [2024-06-03 20:35:24,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5317073170731708 [2024-06-03 20:35:24,757 INFO L175 Difference]: Start difference. First operand has 337 places, 473 transitions, 7646 flow. Second operand 10 states and 218 transitions. [2024-06-03 20:35:24,757 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 346 places, 497 transitions, 9372 flow [2024-06-03 20:35:26,774 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 342 places, 497 transitions, 9170 flow, removed 15 selfloop flow, removed 4 redundant places. [2024-06-03 20:35:26,781 INFO L231 Difference]: Finished difference. Result has 343 places, 473 transitions, 7812 flow [2024-06-03 20:35:26,782 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} [2024-06-03 20:35:26,783 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 301 predicate places. [2024-06-03 20:35:26,783 INFO L495 AbstractCegarLoop]: Abstraction has has 343 places, 473 transitions, 7812 flow [2024-06-03 20:35:26,783 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) [2024-06-03 20:35:26,783 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:26,783 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:26,783 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable98 [2024-06-03 20:35:26,783 INFO L420 AbstractCegarLoop]: === Iteration 100 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:26,791 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:26,791 INFO L85 PathProgramCache]: Analyzing trace with hash -53720317, now seen corresponding path program 9 times [2024-06-03 20:35:26,791 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:26,791 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2086529284] [2024-06-03 20:35:26,791 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:26,791 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:26,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:27,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:27,100 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:27,100 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2086529284] [2024-06-03 20:35:27,100 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2086529284] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:27,100 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:27,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:27,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1963114250] [2024-06-03 20:35:27,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:27,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:27,101 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:27,101 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:27,101 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:27,148 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:27,148 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) [2024-06-03 20:35:27,148 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:27,148 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:27,148 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:27,975 INFO L124 PetriNetUnfolderBase]: 2565/4282 cut-off events. [2024-06-03 20:35:27,975 INFO L125 PetriNetUnfolderBase]: For 493959/493959 co-relation queries the response was YES. [2024-06-03 20:35:28,017 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. [2024-06-03 20:35:28,036 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 359 selfloop transitions, 134 changer transitions 0/499 dead transitions. [2024-06-03 20:35:28,037 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 352 places, 499 transitions, 9431 flow [2024-06-03 20:35:28,037 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:35:28,037 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:35:28,037 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 216 transitions. [2024-06-03 20:35:28,038 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.526829268292683 [2024-06-03 20:35:28,038 INFO L175 Difference]: Start difference. First operand has 343 places, 473 transitions, 7812 flow. Second operand 10 states and 216 transitions. [2024-06-03 20:35:28,038 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 352 places, 499 transitions, 9431 flow [2024-06-03 20:35:30,070 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 499 transitions, 9029 flow, removed 17 selfloop flow, removed 7 redundant places. [2024-06-03 20:35:30,077 INFO L231 Difference]: Finished difference. Result has 346 places, 476 transitions, 7741 flow [2024-06-03 20:35:30,077 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} [2024-06-03 20:35:30,078 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-03 20:35:30,078 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 476 transitions, 7741 flow [2024-06-03 20:35:30,078 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) [2024-06-03 20:35:30,078 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:30,078 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:30,078 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable99 [2024-06-03 20:35:30,078 INFO L420 AbstractCegarLoop]: === Iteration 101 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:30,079 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:30,079 INFO L85 PathProgramCache]: Analyzing trace with hash -53518507, now seen corresponding path program 10 times [2024-06-03 20:35:30,079 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:30,079 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1729870761] [2024-06-03 20:35:30,079 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:30,079 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:30,085 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:30,376 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:30,376 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:30,377 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1729870761] [2024-06-03 20:35:30,377 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1729870761] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:30,377 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:30,377 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:30,377 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2082290174] [2024-06-03 20:35:30,377 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:30,377 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:30,377 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:30,378 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:30,378 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:30,417 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:30,417 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) [2024-06-03 20:35:30,418 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:30,418 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:30,418 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:31,304 INFO L124 PetriNetUnfolderBase]: 2562/4276 cut-off events. [2024-06-03 20:35:31,305 INFO L125 PetriNetUnfolderBase]: For 499338/499338 co-relation queries the response was YES. [2024-06-03 20:35:31,340 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. [2024-06-03 20:35:31,354 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 363 selfloop transitions, 127 changer transitions 0/496 dead transitions. [2024-06-03 20:35:31,354 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 496 transitions, 9121 flow [2024-06-03 20:35:31,355 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:31,355 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:31,355 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 20:35:31,355 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 20:35:31,355 INFO L175 Difference]: Start difference. First operand has 346 places, 476 transitions, 7741 flow. Second operand 8 states and 180 transitions. [2024-06-03 20:35:31,355 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 496 transitions, 9121 flow [2024-06-03 20:35:33,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 345 places, 496 transitions, 8805 flow, removed 24 selfloop flow, removed 8 redundant places. [2024-06-03 20:35:33,306 INFO L231 Difference]: Finished difference. Result has 346 places, 476 transitions, 7685 flow [2024-06-03 20:35:33,307 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} [2024-06-03 20:35:33,307 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 304 predicate places. [2024-06-03 20:35:33,307 INFO L495 AbstractCegarLoop]: Abstraction has has 346 places, 476 transitions, 7685 flow [2024-06-03 20:35:33,307 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) [2024-06-03 20:35:33,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:33,308 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:33,308 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable100 [2024-06-03 20:35:33,308 INFO L420 AbstractCegarLoop]: === Iteration 102 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:33,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:33,308 INFO L85 PathProgramCache]: Analyzing trace with hash -57450547, now seen corresponding path program 11 times [2024-06-03 20:35:33,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:33,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [378906749] [2024-06-03 20:35:33,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:33,309 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:33,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:33,595 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:33,595 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:33,595 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [378906749] [2024-06-03 20:35:33,595 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [378906749] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:33,595 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:33,596 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:33,596 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [676516707] [2024-06-03 20:35:33,596 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:33,596 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:33,596 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:33,596 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:33,596 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:33,644 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:33,644 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) [2024-06-03 20:35:33,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:33,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:33,645 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:34,460 INFO L124 PetriNetUnfolderBase]: 2567/4268 cut-off events. [2024-06-03 20:35:34,461 INFO L125 PetriNetUnfolderBase]: For 510157/510157 co-relation queries the response was YES. [2024-06-03 20:35:34,504 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. [2024-06-03 20:35:34,521 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 275 changer transitions 0/502 dead transitions. [2024-06-03 20:35:34,522 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 353 places, 502 transitions, 9666 flow [2024-06-03 20:35:34,522 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:34,522 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:34,523 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 20:35:34,523 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-03 20:35:34,523 INFO L175 Difference]: Start difference. First operand has 346 places, 476 transitions, 7685 flow. Second operand 8 states and 189 transitions. [2024-06-03 20:35:34,523 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 353 places, 502 transitions, 9666 flow [2024-06-03 20:35:36,743 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 346 places, 502 transitions, 9402 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:35:36,750 INFO L231 Difference]: Finished difference. Result has 347 places, 479 transitions, 8022 flow [2024-06-03 20:35:36,750 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} [2024-06-03 20:35:36,750 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 305 predicate places. [2024-06-03 20:35:36,750 INFO L495 AbstractCegarLoop]: Abstraction has has 347 places, 479 transitions, 8022 flow [2024-06-03 20:35:36,750 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) [2024-06-03 20:35:36,751 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:36,751 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] [2024-06-03 20:35:36,751 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable101 [2024-06-03 20:35:36,751 INFO L420 AbstractCegarLoop]: === Iteration 103 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:36,751 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:36,751 INFO L85 PathProgramCache]: Analyzing trace with hash -919138635, now seen corresponding path program 4 times [2024-06-03 20:35:36,751 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:36,751 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1430530806] [2024-06-03 20:35:36,752 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:36,752 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:36,758 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:37,066 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:37,067 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:37,067 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1430530806] [2024-06-03 20:35:37,067 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1430530806] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:37,067 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:37,067 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:37,067 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1434331648] [2024-06-03 20:35:37,067 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:37,068 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:37,068 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:37,068 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:37,068 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=34, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:37,095 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:37,095 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) [2024-06-03 20:35:37,095 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:37,095 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:37,095 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:37,997 INFO L124 PetriNetUnfolderBase]: 2580/4308 cut-off events. [2024-06-03 20:35:37,997 INFO L125 PetriNetUnfolderBase]: For 527443/527443 co-relation queries the response was YES. [2024-06-03 20:35:38,055 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. [2024-06-03 20:35:38,075 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 371 selfloop transitions, 130 changer transitions 0/507 dead transitions. [2024-06-03 20:35:38,075 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 355 places, 507 transitions, 9740 flow [2024-06-03 20:35:38,076 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:35:38,076 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:35:38,076 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 198 transitions. [2024-06-03 20:35:38,077 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:35:38,077 INFO L175 Difference]: Start difference. First operand has 347 places, 479 transitions, 8022 flow. Second operand 9 states and 198 transitions. [2024-06-03 20:35:38,077 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 355 places, 507 transitions, 9740 flow [2024-06-03 20:35:40,638 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 351 places, 507 transitions, 9221 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:35:40,644 INFO L231 Difference]: Finished difference. Result has 352 places, 485 transitions, 7893 flow [2024-06-03 20:35:40,645 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} [2024-06-03 20:35:40,645 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 310 predicate places. [2024-06-03 20:35:40,645 INFO L495 AbstractCegarLoop]: Abstraction has has 352 places, 485 transitions, 7893 flow [2024-06-03 20:35:40,645 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) [2024-06-03 20:35:40,646 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:40,646 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] [2024-06-03 20:35:40,646 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable102 [2024-06-03 20:35:40,646 INFO L420 AbstractCegarLoop]: === Iteration 104 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:40,647 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:40,647 INFO L85 PathProgramCache]: Analyzing trace with hash -1473178349, now seen corresponding path program 12 times [2024-06-03 20:35:40,647 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:40,647 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1970070167] [2024-06-03 20:35:40,647 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:40,647 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:40,657 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:40,979 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:40,980 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:40,980 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1970070167] [2024-06-03 20:35:40,980 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1970070167] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:40,980 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:40,980 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:40,980 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1591971707] [2024-06-03 20:35:40,980 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:40,981 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:40,981 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:40,981 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:40,981 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:41,047 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:41,055 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) [2024-06-03 20:35:41,055 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:41,055 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:41,055 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:41,874 INFO L124 PetriNetUnfolderBase]: 2577/4285 cut-off events. [2024-06-03 20:35:41,875 INFO L125 PetriNetUnfolderBase]: For 532363/532363 co-relation queries the response was YES. [2024-06-03 20:35:41,919 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. [2024-06-03 20:35:41,937 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 221 selfloop transitions, 281 changer transitions 0/508 dead transitions. [2024-06-03 20:35:41,938 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 359 places, 508 transitions, 9861 flow [2024-06-03 20:35:41,938 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:41,938 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:41,938 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 190 transitions. [2024-06-03 20:35:41,939 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5792682926829268 [2024-06-03 20:35:41,939 INFO L175 Difference]: Start difference. First operand has 352 places, 485 transitions, 7893 flow. Second operand 8 states and 190 transitions. [2024-06-03 20:35:41,939 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 359 places, 508 transitions, 9861 flow [2024-06-03 20:35:44,652 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 354 places, 508 transitions, 9601 flow, removed 38 selfloop flow, removed 5 redundant places. [2024-06-03 20:35:44,660 INFO L231 Difference]: Finished difference. Result has 355 places, 485 transitions, 8201 flow [2024-06-03 20:35:44,660 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} [2024-06-03 20:35:44,660 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 313 predicate places. [2024-06-03 20:35:44,661 INFO L495 AbstractCegarLoop]: Abstraction has has 355 places, 485 transitions, 8201 flow [2024-06-03 20:35:44,661 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) [2024-06-03 20:35:44,661 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:44,661 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:44,661 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable103 [2024-06-03 20:35:44,661 INFO L420 AbstractCegarLoop]: === Iteration 105 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:44,662 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:44,662 INFO L85 PathProgramCache]: Analyzing trace with hash 605980113, now seen corresponding path program 5 times [2024-06-03 20:35:44,662 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:44,662 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1549417064] [2024-06-03 20:35:44,662 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:44,663 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:44,669 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:45,011 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:45,011 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:45,011 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1549417064] [2024-06-03 20:35:45,011 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1549417064] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:45,011 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:45,011 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:45,012 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [959090278] [2024-06-03 20:35:45,012 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:45,012 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:45,012 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:45,012 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:45,012 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:45,063 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:45,063 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) [2024-06-03 20:35:45,064 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:45,064 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:45,064 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:45,870 INFO L124 PetriNetUnfolderBase]: 2582/4316 cut-off events. [2024-06-03 20:35:45,870 INFO L125 PetriNetUnfolderBase]: For 546287/546287 co-relation queries the response was YES. [2024-06-03 20:35:45,914 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. [2024-06-03 20:35:45,931 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 373 selfloop transitions, 131 changer transitions 0/510 dead transitions. [2024-06-03 20:35:45,932 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 510 transitions, 9878 flow [2024-06-03 20:35:45,932 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:35:45,932 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:35:45,933 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 200 transitions. [2024-06-03 20:35:45,933 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5420054200542005 [2024-06-03 20:35:45,933 INFO L175 Difference]: Start difference. First operand has 355 places, 485 transitions, 8201 flow. Second operand 9 states and 200 transitions. [2024-06-03 20:35:45,933 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 510 transitions, 9878 flow [2024-06-03 20:35:48,533 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 356 places, 510 transitions, 9260 flow, removed 0 selfloop flow, removed 7 redundant places. [2024-06-03 20:35:48,540 INFO L231 Difference]: Finished difference. Result has 357 places, 488 transitions, 7916 flow [2024-06-03 20:35:48,540 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} [2024-06-03 20:35:48,540 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-03 20:35:48,540 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 488 transitions, 7916 flow [2024-06-03 20:35:48,540 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) [2024-06-03 20:35:48,540 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:48,541 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:48,541 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable104 [2024-06-03 20:35:48,541 INFO L420 AbstractCegarLoop]: === Iteration 106 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:48,541 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:48,541 INFO L85 PathProgramCache]: Analyzing trace with hash -1462056851, now seen corresponding path program 1 times [2024-06-03 20:35:48,541 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:48,541 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [200773459] [2024-06-03 20:35:48,542 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:48,542 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:48,548 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:48,866 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:48,866 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:48,867 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [200773459] [2024-06-03 20:35:48,867 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [200773459] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:48,867 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:48,867 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:48,867 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [250743563] [2024-06-03 20:35:48,867 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:48,867 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:48,867 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:48,868 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:48,868 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:48,925 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:48,925 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) [2024-06-03 20:35:48,925 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:48,925 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:48,925 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:49,697 INFO L124 PetriNetUnfolderBase]: 2602/4356 cut-off events. [2024-06-03 20:35:49,697 INFO L125 PetriNetUnfolderBase]: For 574857/574857 co-relation queries the response was YES. [2024-06-03 20:35:49,742 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. [2024-06-03 20:35:49,759 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 456 selfloop transitions, 54 changer transitions 0/516 dead transitions. [2024-06-03 20:35:49,759 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 364 places, 516 transitions, 9076 flow [2024-06-03 20:35:49,759 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:35:49,759 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:35:49,760 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-03 20:35:49,760 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:35:49,760 INFO L175 Difference]: Start difference. First operand has 357 places, 488 transitions, 7916 flow. Second operand 8 states and 176 transitions. [2024-06-03 20:35:49,760 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 364 places, 516 transitions, 9076 flow [2024-06-03 20:35:52,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 355 places, 516 transitions, 8613 flow, removed 24 selfloop flow, removed 9 redundant places. [2024-06-03 20:35:52,302 INFO L231 Difference]: Finished difference. Result has 357 places, 491 transitions, 7619 flow [2024-06-03 20:35:52,302 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} [2024-06-03 20:35:52,302 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 315 predicate places. [2024-06-03 20:35:52,302 INFO L495 AbstractCegarLoop]: Abstraction has has 357 places, 491 transitions, 7619 flow [2024-06-03 20:35:52,303 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) [2024-06-03 20:35:52,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:52,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:52,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable105 [2024-06-03 20:35:52,303 INFO L420 AbstractCegarLoop]: === Iteration 107 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:52,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:52,304 INFO L85 PathProgramCache]: Analyzing trace with hash -1526655861, now seen corresponding path program 7 times [2024-06-03 20:35:52,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:52,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1813480051] [2024-06-03 20:35:52,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:52,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:52,310 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:52,631 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:52,632 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:52,632 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1813480051] [2024-06-03 20:35:52,632 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1813480051] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:52,632 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:52,632 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:52,632 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1856648366] [2024-06-03 20:35:52,632 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:52,633 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:52,633 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:52,633 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:52,633 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:52,675 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:52,675 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) [2024-06-03 20:35:52,675 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:52,675 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:52,675 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:53,482 INFO L124 PetriNetUnfolderBase]: 2630/4400 cut-off events. [2024-06-03 20:35:53,483 INFO L125 PetriNetUnfolderBase]: For 592958/592958 co-relation queries the response was YES. [2024-06-03 20:35:53,527 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. [2024-06-03 20:35:53,677 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 474 selfloop transitions, 33 changer transitions 0/513 dead transitions. [2024-06-03 20:35:53,678 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 363 places, 513 transitions, 8735 flow [2024-06-03 20:35:53,678 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:35:53,678 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:35:53,678 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 156 transitions. [2024-06-03 20:35:53,679 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5435540069686411 [2024-06-03 20:35:53,679 INFO L175 Difference]: Start difference. First operand has 357 places, 491 transitions, 7619 flow. Second operand 7 states and 156 transitions. [2024-06-03 20:35:53,679 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 363 places, 513 transitions, 8735 flow [2024-06-03 20:35:56,437 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 359 places, 513 transitions, 8655 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:35:56,443 INFO L231 Difference]: Finished difference. Result has 360 places, 492 transitions, 7636 flow [2024-06-03 20:35:56,443 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} [2024-06-03 20:35:56,443 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 318 predicate places. [2024-06-03 20:35:56,443 INFO L495 AbstractCegarLoop]: Abstraction has has 360 places, 492 transitions, 7636 flow [2024-06-03 20:35:56,443 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) [2024-06-03 20:35:56,443 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:35:56,444 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:35:56,444 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable106 [2024-06-03 20:35:56,444 INFO L420 AbstractCegarLoop]: === Iteration 108 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:35:56,444 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:35:56,444 INFO L85 PathProgramCache]: Analyzing trace with hash -1537697751, now seen corresponding path program 8 times [2024-06-03 20:35:56,444 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:35:56,444 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1445628266] [2024-06-03 20:35:56,445 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:35:56,445 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:35:56,452 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:35:56,761 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:35:56,761 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:35:56,761 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1445628266] [2024-06-03 20:35:56,761 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1445628266] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:35:56,761 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:35:56,761 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:35:56,761 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [968834887] [2024-06-03 20:35:56,761 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:35:56,763 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:35:56,764 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:35:56,764 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:35:56,764 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:35:56,827 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:35:56,827 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) [2024-06-03 20:35:56,828 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:35:56,828 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:35:56,828 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:35:57,732 INFO L124 PetriNetUnfolderBase]: 2645/4429 cut-off events. [2024-06-03 20:35:57,732 INFO L125 PetriNetUnfolderBase]: For 595881/595881 co-relation queries the response was YES. [2024-06-03 20:35:57,780 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. [2024-06-03 20:35:57,798 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 479 selfloop transitions, 35 changer transitions 0/520 dead transitions. [2024-06-03 20:35:57,799 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 366 places, 520 transitions, 8784 flow [2024-06-03 20:35:57,799 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:35:57,799 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:35:57,799 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-03 20:35:57,800 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-03 20:35:57,800 INFO L175 Difference]: Start difference. First operand has 360 places, 492 transitions, 7636 flow. Second operand 7 states and 162 transitions. [2024-06-03 20:35:57,800 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 366 places, 520 transitions, 8784 flow [2024-06-03 20:36:00,841 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 361 places, 520 transitions, 8705 flow, removed 8 selfloop flow, removed 5 redundant places. [2024-06-03 20:36:00,847 INFO L231 Difference]: Finished difference. Result has 362 places, 493 transitions, 7660 flow [2024-06-03 20:36:00,848 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} [2024-06-03 20:36:00,848 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 320 predicate places. [2024-06-03 20:36:00,848 INFO L495 AbstractCegarLoop]: Abstraction has has 362 places, 493 transitions, 7660 flow [2024-06-03 20:36:00,848 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) [2024-06-03 20:36:00,848 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:00,848 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:00,848 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable107 [2024-06-03 20:36:00,849 INFO L420 AbstractCegarLoop]: === Iteration 109 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:36:00,849 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:00,849 INFO L85 PathProgramCache]: Analyzing trace with hash 2087286543, now seen corresponding path program 9 times [2024-06-03 20:36:00,849 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:00,849 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [626707684] [2024-06-03 20:36:00,849 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:00,849 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:00,856 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:01,179 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:01,180 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:01,180 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [626707684] [2024-06-03 20:36:01,180 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [626707684] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:01,180 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:01,180 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:01,188 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1778214820] [2024-06-03 20:36:01,188 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:01,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:01,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:01,189 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:01,189 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:01,244 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:01,245 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) [2024-06-03 20:36:01,245 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:01,245 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:01,245 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:02,116 INFO L124 PetriNetUnfolderBase]: 2632/4410 cut-off events. [2024-06-03 20:36:02,117 INFO L125 PetriNetUnfolderBase]: For 570147/570147 co-relation queries the response was YES. [2024-06-03 20:36:02,169 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. [2024-06-03 20:36:02,187 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 479 selfloop transitions, 41 changer transitions 0/526 dead transitions. [2024-06-03 20:36:02,188 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 368 places, 526 transitions, 8820 flow [2024-06-03 20:36:02,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:36:02,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:36:02,189 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 168 transitions. [2024-06-03 20:36:02,189 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5853658536585366 [2024-06-03 20:36:02,189 INFO L175 Difference]: Start difference. First operand has 362 places, 493 transitions, 7660 flow. Second operand 7 states and 168 transitions. [2024-06-03 20:36:02,189 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 368 places, 526 transitions, 8820 flow [2024-06-03 20:36:05,296 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 526 transitions, 8735 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 20:36:05,302 INFO L231 Difference]: Finished difference. Result has 364 places, 493 transitions, 7661 flow [2024-06-03 20:36:05,302 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} [2024-06-03 20:36:05,303 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-03 20:36:05,303 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 493 transitions, 7661 flow [2024-06-03 20:36:05,303 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) [2024-06-03 20:36:05,303 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:05,303 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:05,303 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable108 [2024-06-03 20:36:05,303 INFO L420 AbstractCegarLoop]: === Iteration 110 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:36:05,304 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:05,304 INFO L85 PathProgramCache]: Analyzing trace with hash 280982325, now seen corresponding path program 6 times [2024-06-03 20:36:05,304 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:05,304 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [857944630] [2024-06-03 20:36:05,304 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:05,304 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:05,328 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:05,655 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:05,655 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:05,655 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [857944630] [2024-06-03 20:36:05,655 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [857944630] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:05,656 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:05,656 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:05,656 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [278343298] [2024-06-03 20:36:05,656 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:05,656 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:05,656 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:05,656 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:05,657 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:05,702 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:05,703 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) [2024-06-03 20:36:05,703 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:05,703 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:05,703 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:06,640 INFO L124 PetriNetUnfolderBase]: 2637/4423 cut-off events. [2024-06-03 20:36:06,640 INFO L125 PetriNetUnfolderBase]: For 561038/561055 co-relation queries the response was YES. [2024-06-03 20:36:06,685 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. [2024-06-03 20:36:06,702 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 379 selfloop transitions, 128 changer transitions 0/513 dead transitions. [2024-06-03 20:36:06,702 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 513 transitions, 9346 flow [2024-06-03 20:36:06,703 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:36:06,703 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:36:06,703 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 159 transitions. [2024-06-03 20:36:06,703 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.554006968641115 [2024-06-03 20:36:06,703 INFO L175 Difference]: Start difference. First operand has 364 places, 493 transitions, 7661 flow. Second operand 7 states and 159 transitions. [2024-06-03 20:36:06,703 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 513 transitions, 9346 flow [2024-06-03 20:36:09,511 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 513 transitions, 9214 flow, removed 11 selfloop flow, removed 6 redundant places. [2024-06-03 20:36:09,517 INFO L231 Difference]: Finished difference. Result has 365 places, 496 transitions, 7840 flow [2024-06-03 20:36:09,517 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} [2024-06-03 20:36:09,517 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 323 predicate places. [2024-06-03 20:36:09,517 INFO L495 AbstractCegarLoop]: Abstraction has has 365 places, 496 transitions, 7840 flow [2024-06-03 20:36:09,518 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) [2024-06-03 20:36:09,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:09,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:09,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable109 [2024-06-03 20:36:09,518 INFO L420 AbstractCegarLoop]: === Iteration 111 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:36:09,518 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:09,518 INFO L85 PathProgramCache]: Analyzing trace with hash -209012735, now seen corresponding path program 13 times [2024-06-03 20:36:09,532 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:09,532 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1050623124] [2024-06-03 20:36:09,532 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:09,533 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:09,539 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:09,871 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:09,871 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:09,871 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1050623124] [2024-06-03 20:36:09,872 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1050623124] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:09,872 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:09,872 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:09,872 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [924743495] [2024-06-03 20:36:09,872 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:09,872 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:09,872 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:09,872 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:09,872 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:09,910 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:09,910 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) [2024-06-03 20:36:09,910 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:09,910 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:09,910 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:10,808 INFO L124 PetriNetUnfolderBase]: 2634/4419 cut-off events. [2024-06-03 20:36:10,808 INFO L125 PetriNetUnfolderBase]: For 566195/566212 co-relation queries the response was YES. [2024-06-03 20:36:10,853 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. [2024-06-03 20:36:10,871 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 357 selfloop transitions, 160 changer transitions 0/523 dead transitions. [2024-06-03 20:36:10,871 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 374 places, 523 transitions, 9136 flow [2024-06-03 20:36:10,872 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:36:10,872 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:36:10,872 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 217 transitions. [2024-06-03 20:36:10,872 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5292682926829269 [2024-06-03 20:36:10,872 INFO L175 Difference]: Start difference. First operand has 365 places, 496 transitions, 7840 flow. Second operand 10 states and 217 transitions. [2024-06-03 20:36:10,872 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 374 places, 523 transitions, 9136 flow [2024-06-03 20:36:14,027 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 523 transitions, 8750 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 20:36:14,033 INFO L231 Difference]: Finished difference. Result has 369 places, 496 transitions, 7780 flow [2024-06-03 20:36:14,033 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} [2024-06-03 20:36:14,033 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-03 20:36:14,034 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 496 transitions, 7780 flow [2024-06-03 20:36:14,034 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) [2024-06-03 20:36:14,034 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:14,034 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:14,034 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable110 [2024-06-03 20:36:14,034 INFO L420 AbstractCegarLoop]: === Iteration 112 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:36:14,034 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:14,034 INFO L85 PathProgramCache]: Analyzing trace with hash 1941848889, now seen corresponding path program 13 times [2024-06-03 20:36:14,035 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:14,035 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1991106035] [2024-06-03 20:36:14,035 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:14,035 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:14,041 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:14,351 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:14,351 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:14,351 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1991106035] [2024-06-03 20:36:14,351 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1991106035] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:14,351 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:14,351 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:14,351 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1712866126] [2024-06-03 20:36:14,352 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:14,352 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:14,352 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:14,352 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:14,352 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:14,402 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:14,402 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) [2024-06-03 20:36:14,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:14,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:14,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:15,224 INFO L124 PetriNetUnfolderBase]: 2644/4422 cut-off events. [2024-06-03 20:36:15,225 INFO L125 PetriNetUnfolderBase]: For 579619/579619 co-relation queries the response was YES. [2024-06-03 20:36:15,274 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. [2024-06-03 20:36:15,291 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 252 selfloop transitions, 275 changer transitions 0/533 dead transitions. [2024-06-03 20:36:15,291 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 533 transitions, 9807 flow [2024-06-03 20:36:15,292 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:36:15,292 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:36:15,292 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 20:36:15,292 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-03 20:36:15,292 INFO L175 Difference]: Start difference. First operand has 369 places, 496 transitions, 7780 flow. Second operand 8 states and 197 transitions. [2024-06-03 20:36:15,292 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 533 transitions, 9807 flow [2024-06-03 20:36:18,740 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 533 transitions, 9491 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 20:36:18,747 INFO L231 Difference]: Finished difference. Result has 371 places, 502 transitions, 8232 flow [2024-06-03 20:36:18,747 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} [2024-06-03 20:36:18,747 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-03 20:36:18,747 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 502 transitions, 8232 flow [2024-06-03 20:36:18,747 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) [2024-06-03 20:36:18,748 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:18,748 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:18,748 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable111 [2024-06-03 20:36:18,748 INFO L420 AbstractCegarLoop]: === Iteration 113 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:36:18,748 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:18,748 INFO L85 PathProgramCache]: Analyzing trace with hash 2074018319, now seen corresponding path program 7 times [2024-06-03 20:36:18,748 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:18,748 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [490706909] [2024-06-03 20:36:18,749 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:18,749 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:18,755 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:19,085 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:19,086 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:19,086 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [490706909] [2024-06-03 20:36:19,086 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [490706909] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:19,086 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:19,086 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:19,086 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1976729801] [2024-06-03 20:36:19,086 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:19,086 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:19,087 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:19,087 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:19,087 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:19,119 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:19,119 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) [2024-06-03 20:36:19,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:19,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:19,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:20,039 INFO L124 PetriNetUnfolderBase]: 2641/4433 cut-off events. [2024-06-03 20:36:20,039 INFO L125 PetriNetUnfolderBase]: For 585685/585702 co-relation queries the response was YES. [2024-06-03 20:36:20,082 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. [2024-06-03 20:36:20,098 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 384 selfloop transitions, 128 changer transitions 0/518 dead transitions. [2024-06-03 20:36:20,098 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 518 transitions, 9694 flow [2024-06-03 20:36:20,099 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:36:20,099 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:36:20,099 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 20:36:20,099 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-03 20:36:20,099 INFO L175 Difference]: Start difference. First operand has 371 places, 502 transitions, 8232 flow. Second operand 7 states and 157 transitions. [2024-06-03 20:36:20,099 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 518 transitions, 9694 flow [2024-06-03 20:36:22,998 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 518 transitions, 9128 flow, removed 25 selfloop flow, removed 8 redundant places. [2024-06-03 20:36:23,004 INFO L231 Difference]: Finished difference. Result has 370 places, 502 transitions, 7936 flow [2024-06-03 20:36:23,004 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} [2024-06-03 20:36:23,004 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-03 20:36:23,005 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 502 transitions, 7936 flow [2024-06-03 20:36:23,005 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) [2024-06-03 20:36:23,005 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:23,005 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:23,005 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable112 [2024-06-03 20:36:23,005 INFO L420 AbstractCegarLoop]: === Iteration 114 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:36:23,005 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:23,006 INFO L85 PathProgramCache]: Analyzing trace with hash 1941848703, now seen corresponding path program 14 times [2024-06-03 20:36:23,006 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:23,006 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1922142574] [2024-06-03 20:36:23,006 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:23,006 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:23,013 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:23,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:23,340 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:23,340 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1922142574] [2024-06-03 20:36:23,341 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1922142574] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:23,341 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:23,341 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:23,341 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [292931344] [2024-06-03 20:36:23,342 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:23,343 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:23,343 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:23,343 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:23,343 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:23,393 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:23,393 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) [2024-06-03 20:36:23,394 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:23,394 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:23,394 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:24,286 INFO L124 PetriNetUnfolderBase]: 2638/4416 cut-off events. [2024-06-03 20:36:24,286 INFO L125 PetriNetUnfolderBase]: For 565371/565371 co-relation queries the response was YES. [2024-06-03 20:36:24,335 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. [2024-06-03 20:36:24,352 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 365 selfloop transitions, 159 changer transitions 0/530 dead transitions. [2024-06-03 20:36:24,352 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 530 transitions, 9252 flow [2024-06-03 20:36:24,353 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:36:24,353 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:36:24,353 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 188 transitions. [2024-06-03 20:36:24,353 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.573170731707317 [2024-06-03 20:36:24,353 INFO L175 Difference]: Start difference. First operand has 370 places, 502 transitions, 7936 flow. Second operand 8 states and 188 transitions. [2024-06-03 20:36:24,353 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 530 transitions, 9252 flow [2024-06-03 20:36:27,673 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 371 places, 530 transitions, 8984 flow, removed 4 selfloop flow, removed 6 redundant places. [2024-06-03 20:36:27,679 INFO L231 Difference]: Finished difference. Result has 372 places, 502 transitions, 7996 flow [2024-06-03 20:36:27,680 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} [2024-06-03 20:36:27,680 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 330 predicate places. [2024-06-03 20:36:27,680 INFO L495 AbstractCegarLoop]: Abstraction has has 372 places, 502 transitions, 7996 flow [2024-06-03 20:36:27,680 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) [2024-06-03 20:36:27,680 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:27,680 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:27,681 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable113 [2024-06-03 20:36:27,681 INFO L420 AbstractCegarLoop]: === Iteration 115 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:36:27,681 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:27,681 INFO L85 PathProgramCache]: Analyzing trace with hash -2028913539, now seen corresponding path program 14 times [2024-06-03 20:36:27,681 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:27,681 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1397806738] [2024-06-03 20:36:27,681 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:27,682 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:27,688 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:27,997 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:27,997 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:27,997 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1397806738] [2024-06-03 20:36:27,997 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1397806738] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:27,997 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:27,998 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:27,998 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [833392192] [2024-06-03 20:36:27,998 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:27,998 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:27,998 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:27,998 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:27,999 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:28,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:28,053 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) [2024-06-03 20:36:28,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:28,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:28,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:28,931 INFO L124 PetriNetUnfolderBase]: 2632/4406 cut-off events. [2024-06-03 20:36:28,931 INFO L125 PetriNetUnfolderBase]: For 571638/571638 co-relation queries the response was YES. [2024-06-03 20:36:28,977 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. [2024-06-03 20:36:28,993 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 251 selfloop transitions, 279 changer transitions 0/536 dead transitions. [2024-06-03 20:36:28,994 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 536 transitions, 10138 flow [2024-06-03 20:36:28,994 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:36:28,994 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:36:28,995 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 239 transitions. [2024-06-03 20:36:28,995 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5829268292682926 [2024-06-03 20:36:28,995 INFO L175 Difference]: Start difference. First operand has 372 places, 502 transitions, 7996 flow. Second operand 10 states and 239 transitions. [2024-06-03 20:36:28,995 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 536 transitions, 10138 flow [2024-06-03 20:36:32,466 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 375 places, 536 transitions, 9840 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 20:36:32,499 INFO L231 Difference]: Finished difference. Result has 376 places, 502 transitions, 8285 flow [2024-06-03 20:36:32,500 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} [2024-06-03 20:36:32,500 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 334 predicate places. [2024-06-03 20:36:32,500 INFO L495 AbstractCegarLoop]: Abstraction has has 376 places, 502 transitions, 8285 flow [2024-06-03 20:36:32,501 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) [2024-06-03 20:36:32,501 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:32,501 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:32,501 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable114 [2024-06-03 20:36:32,501 INFO L420 AbstractCegarLoop]: === Iteration 116 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:36:32,501 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:32,501 INFO L85 PathProgramCache]: Analyzing trace with hash -1878109283, now seen corresponding path program 15 times [2024-06-03 20:36:32,501 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:32,502 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [87052535] [2024-06-03 20:36:32,502 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:32,502 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:32,508 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:32,826 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:32,827 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:32,827 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [87052535] [2024-06-03 20:36:32,827 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [87052535] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:32,827 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:32,827 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:32,827 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1564525027] [2024-06-03 20:36:32,827 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:32,827 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:32,828 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:32,828 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:32,828 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:32,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:32,877 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) [2024-06-03 20:36:32,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:32,877 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:32,877 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:33,718 INFO L124 PetriNetUnfolderBase]: 2629/4407 cut-off events. [2024-06-03 20:36:33,718 INFO L125 PetriNetUnfolderBase]: For 563241/563241 co-relation queries the response was YES. [2024-06-03 20:36:33,763 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. [2024-06-03 20:36:33,779 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 366 selfloop transitions, 162 changer transitions 0/534 dead transitions. [2024-06-03 20:36:33,779 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 386 places, 534 transitions, 9819 flow [2024-06-03 20:36:33,779 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:36:33,779 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:36:33,780 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 242 transitions. [2024-06-03 20:36:33,780 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:36:33,780 INFO L175 Difference]: Start difference. First operand has 376 places, 502 transitions, 8285 flow. Second operand 11 states and 242 transitions. [2024-06-03 20:36:33,780 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 386 places, 534 transitions, 9819 flow [2024-06-03 20:36:36,614 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 534 transitions, 9018 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-06-03 20:36:36,621 INFO L231 Difference]: Finished difference. Result has 373 places, 502 transitions, 7834 flow [2024-06-03 20:36:36,621 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} [2024-06-03 20:36:36,622 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 331 predicate places. [2024-06-03 20:36:36,622 INFO L495 AbstractCegarLoop]: Abstraction has has 373 places, 502 transitions, 7834 flow [2024-06-03 20:36:36,622 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) [2024-06-03 20:36:36,622 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:36,622 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:36,622 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable115 [2024-06-03 20:36:36,622 INFO L420 AbstractCegarLoop]: === Iteration 117 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:36:36,624 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:36,624 INFO L85 PathProgramCache]: Analyzing trace with hash -1564666245, now seen corresponding path program 8 times [2024-06-03 20:36:36,624 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:36,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1130301901] [2024-06-03 20:36:36,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:36,625 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:36,633 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:37,024 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:37,024 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:37,024 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1130301901] [2024-06-03 20:36:37,024 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1130301901] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:37,024 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:37,024 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:37,025 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1851803013] [2024-06-03 20:36:37,025 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:37,025 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:37,025 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:37,025 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:37,025 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=25, Invalid=31, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:37,052 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:37,053 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) [2024-06-03 20:36:37,053 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:37,053 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:37,053 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:37,912 INFO L124 PetriNetUnfolderBase]: 2626/4403 cut-off events. [2024-06-03 20:36:37,913 INFO L125 PetriNetUnfolderBase]: For 535506/535506 co-relation queries the response was YES. [2024-06-03 20:36:38,126 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. [2024-06-03 20:36:38,142 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 382 selfloop transitions, 134 changer transitions 0/522 dead transitions. [2024-06-03 20:36:38,142 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 522 transitions, 9502 flow [2024-06-03 20:36:38,143 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:36:38,143 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:36:38,143 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:36:38,143 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:36:38,143 INFO L175 Difference]: Start difference. First operand has 373 places, 502 transitions, 7834 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:36:38,143 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 522 transitions, 9502 flow [2024-06-03 20:36:40,738 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 369 places, 522 transitions, 9158 flow, removed 10 selfloop flow, removed 10 redundant places. [2024-06-03 20:36:40,744 INFO L231 Difference]: Finished difference. Result has 370 places, 502 transitions, 7784 flow [2024-06-03 20:36:40,744 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} [2024-06-03 20:36:40,751 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 328 predicate places. [2024-06-03 20:36:40,752 INFO L495 AbstractCegarLoop]: Abstraction has has 370 places, 502 transitions, 7784 flow [2024-06-03 20:36:40,752 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) [2024-06-03 20:36:40,752 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:40,752 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:40,753 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable116 [2024-06-03 20:36:40,753 INFO L420 AbstractCegarLoop]: === Iteration 118 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:36:40,753 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:40,753 INFO L85 PathProgramCache]: Analyzing trace with hash -1564672197, now seen corresponding path program 16 times [2024-06-03 20:36:40,753 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:40,753 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [527827607] [2024-06-03 20:36:40,753 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:40,754 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:40,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:41,091 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:41,091 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:41,091 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [527827607] [2024-06-03 20:36:41,091 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [527827607] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:41,091 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:41,092 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:41,092 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1643556371] [2024-06-03 20:36:41,092 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:41,092 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:41,092 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:41,092 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:41,092 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:41,141 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:41,141 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) [2024-06-03 20:36:41,142 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:41,142 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:41,142 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:41,996 INFO L124 PetriNetUnfolderBase]: 2623/4399 cut-off events. [2024-06-03 20:36:41,997 INFO L125 PetriNetUnfolderBase]: For 520541/520541 co-relation queries the response was YES. [2024-06-03 20:36:42,041 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. [2024-06-03 20:36:42,056 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 367 selfloop transitions, 162 changer transitions 0/535 dead transitions. [2024-06-03 20:36:42,057 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 382 places, 535 transitions, 9116 flow [2024-06-03 20:36:42,057 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:36:42,057 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:36:42,057 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 277 transitions. [2024-06-03 20:36:42,058 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5196998123827392 [2024-06-03 20:36:42,058 INFO L175 Difference]: Start difference. First operand has 370 places, 502 transitions, 7784 flow. Second operand 13 states and 277 transitions. [2024-06-03 20:36:42,058 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 382 places, 535 transitions, 9116 flow [2024-06-03 20:36:45,059 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 374 places, 535 transitions, 8765 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 20:36:45,066 INFO L231 Difference]: Finished difference. Result has 375 places, 502 transitions, 7775 flow [2024-06-03 20:36:45,066 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} [2024-06-03 20:36:45,066 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 333 predicate places. [2024-06-03 20:36:45,067 INFO L495 AbstractCegarLoop]: Abstraction has has 375 places, 502 transitions, 7775 flow [2024-06-03 20:36:45,067 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) [2024-06-03 20:36:45,067 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:45,067 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:45,067 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable117 [2024-06-03 20:36:45,067 INFO L420 AbstractCegarLoop]: === Iteration 119 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:36:45,067 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:45,068 INFO L85 PathProgramCache]: Analyzing trace with hash 965448189, now seen corresponding path program 9 times [2024-06-03 20:36:45,068 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:45,068 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [603252344] [2024-06-03 20:36:45,068 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:45,068 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:45,077 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:45,398 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:45,399 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:45,399 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [603252344] [2024-06-03 20:36:45,399 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [603252344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:45,399 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:45,399 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:45,399 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1437268889] [2024-06-03 20:36:45,399 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:45,400 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:45,400 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:45,400 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:45,400 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=32, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:45,441 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:45,442 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) [2024-06-03 20:36:45,442 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:45,442 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:45,442 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:46,222 INFO L124 PetriNetUnfolderBase]: 2620/4396 cut-off events. [2024-06-03 20:36:46,223 INFO L125 PetriNetUnfolderBase]: For 505238/505238 co-relation queries the response was YES. [2024-06-03 20:36:46,270 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. [2024-06-03 20:36:46,286 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 380 selfloop transitions, 135 changer transitions 0/521 dead transitions. [2024-06-03 20:36:46,286 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 381 places, 521 transitions, 9235 flow [2024-06-03 20:36:46,287 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:36:46,287 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:36:46,287 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:36:46,287 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 20:36:46,288 INFO L175 Difference]: Start difference. First operand has 375 places, 502 transitions, 7775 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:36:46,288 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 381 places, 521 transitions, 9235 flow [2024-06-03 20:36:48,908 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 368 places, 521 transitions, 8859 flow, removed 10 selfloop flow, removed 13 redundant places. [2024-06-03 20:36:48,914 INFO L231 Difference]: Finished difference. Result has 369 places, 502 transitions, 7695 flow [2024-06-03 20:36:48,915 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} [2024-06-03 20:36:48,915 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 327 predicate places. [2024-06-03 20:36:48,915 INFO L495 AbstractCegarLoop]: Abstraction has has 369 places, 502 transitions, 7695 flow [2024-06-03 20:36:48,915 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) [2024-06-03 20:36:48,915 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:48,915 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:48,916 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable118 [2024-06-03 20:36:48,916 INFO L420 AbstractCegarLoop]: === Iteration 120 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:36:48,916 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:48,916 INFO L85 PathProgramCache]: Analyzing trace with hash -1564660851, now seen corresponding path program 15 times [2024-06-03 20:36:48,916 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:48,916 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1185147554] [2024-06-03 20:36:48,916 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:48,916 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:48,923 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:49,217 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:49,217 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:49,217 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1185147554] [2024-06-03 20:36:49,217 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1185147554] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:49,217 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:49,218 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:49,218 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [769352587] [2024-06-03 20:36:49,218 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:49,218 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:49,218 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:49,218 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:49,218 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:49,258 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:49,258 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) [2024-06-03 20:36:49,258 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:49,258 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:49,258 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:50,172 INFO L124 PetriNetUnfolderBase]: 2614/4380 cut-off events. [2024-06-03 20:36:50,172 INFO L125 PetriNetUnfolderBase]: For 490741/490741 co-relation queries the response was YES. [2024-06-03 20:36:50,212 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. [2024-06-03 20:36:50,226 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 244 selfloop transitions, 286 changer transitions 0/536 dead transitions. [2024-06-03 20:36:50,226 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 536 transitions, 9597 flow [2024-06-03 20:36:50,227 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:36:50,227 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:36:50,227 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 254 transitions. [2024-06-03 20:36:50,227 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5631929046563193 [2024-06-03 20:36:50,227 INFO L175 Difference]: Start difference. First operand has 369 places, 502 transitions, 7695 flow. Second operand 11 states and 254 transitions. [2024-06-03 20:36:50,227 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 536 transitions, 9597 flow [2024-06-03 20:36:52,995 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 536 transitions, 9261 flow, removed 27 selfloop flow, removed 9 redundant places. [2024-06-03 20:36:53,001 INFO L231 Difference]: Finished difference. Result has 371 places, 502 transitions, 7978 flow [2024-06-03 20:36:53,001 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} [2024-06-03 20:36:53,001 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-03 20:36:53,002 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 502 transitions, 7978 flow [2024-06-03 20:36:53,002 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) [2024-06-03 20:36:53,002 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:53,002 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:53,002 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable119 [2024-06-03 20:36:53,002 INFO L420 AbstractCegarLoop]: === Iteration 121 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:36:53,002 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:53,003 INFO L85 PathProgramCache]: Analyzing trace with hash -1021144545, now seen corresponding path program 10 times [2024-06-03 20:36:53,003 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:53,003 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [417915024] [2024-06-03 20:36:53,003 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:53,003 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:53,010 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:53,339 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:53,339 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:53,339 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [417915024] [2024-06-03 20:36:53,339 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [417915024] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:53,340 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:53,340 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:53,340 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [75502484] [2024-06-03 20:36:53,340 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:53,340 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:53,340 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:53,340 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:53,341 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:53,392 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:53,392 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) [2024-06-03 20:36:53,392 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:53,392 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:53,393 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:54,244 INFO L124 PetriNetUnfolderBase]: 2611/4388 cut-off events. [2024-06-03 20:36:54,244 INFO L125 PetriNetUnfolderBase]: For 464024/464030 co-relation queries the response was YES. [2024-06-03 20:36:54,297 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. [2024-06-03 20:36:54,316 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 443 selfloop transitions, 74 changer transitions 0/523 dead transitions. [2024-06-03 20:36:54,317 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 523 transitions, 9250 flow [2024-06-03 20:36:54,317 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:36:54,317 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:36:54,317 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 164 transitions. [2024-06-03 20:36:54,318 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5714285714285714 [2024-06-03 20:36:54,318 INFO L175 Difference]: Start difference. First operand has 371 places, 502 transitions, 7978 flow. Second operand 7 states and 164 transitions. [2024-06-03 20:36:54,318 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 523 transitions, 9250 flow [2024-06-03 20:36:56,835 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 363 places, 523 transitions, 8638 flow, removed 12 selfloop flow, removed 14 redundant places. [2024-06-03 20:36:56,841 INFO L231 Difference]: Finished difference. Result has 364 places, 502 transitions, 7529 flow [2024-06-03 20:36:56,841 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} [2024-06-03 20:36:56,841 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 322 predicate places. [2024-06-03 20:36:56,841 INFO L495 AbstractCegarLoop]: Abstraction has has 364 places, 502 transitions, 7529 flow [2024-06-03 20:36:56,842 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) [2024-06-03 20:36:56,842 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:36:56,842 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:36:56,842 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable120 [2024-06-03 20:36:56,842 INFO L420 AbstractCegarLoop]: === Iteration 122 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:36:56,842 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:36:56,842 INFO L85 PathProgramCache]: Analyzing trace with hash -1021144731, now seen corresponding path program 16 times [2024-06-03 20:36:56,842 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:36:56,842 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [540185379] [2024-06-03 20:36:56,843 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:36:56,843 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:36:56,849 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:36:57,172 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:36:57,173 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:36:57,173 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [540185379] [2024-06-03 20:36:57,173 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [540185379] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:36:57,173 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:36:57,173 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:36:57,173 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1589060949] [2024-06-03 20:36:57,173 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:36:57,174 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:36:57,174 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:36:57,174 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:36:57,174 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:36:57,211 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:36:57,211 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) [2024-06-03 20:36:57,211 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:36:57,211 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:36:57,211 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:36:58,014 INFO L124 PetriNetUnfolderBase]: 2655/4465 cut-off events. [2024-06-03 20:36:58,014 INFO L125 PetriNetUnfolderBase]: For 452542/452548 co-relation queries the response was YES. [2024-06-03 20:36:58,058 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. [2024-06-03 20:36:58,074 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 438 selfloop transitions, 103 changer transitions 0/547 dead transitions. [2024-06-03 20:36:58,074 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 370 places, 547 transitions, 9614 flow [2024-06-03 20:36:58,075 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:36:58,075 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:36:58,075 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 171 transitions. [2024-06-03 20:36:58,076 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5958188153310104 [2024-06-03 20:36:58,076 INFO L175 Difference]: Start difference. First operand has 364 places, 502 transitions, 7529 flow. Second operand 7 states and 171 transitions. [2024-06-03 20:36:58,076 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 370 places, 547 transitions, 9614 flow [2024-06-03 20:37:00,211 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 364 places, 547 transitions, 9386 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 20:37:00,217 INFO L231 Difference]: Finished difference. Result has 366 places, 519 transitions, 7904 flow [2024-06-03 20:37:00,217 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} [2024-06-03 20:37:00,218 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 324 predicate places. [2024-06-03 20:37:00,218 INFO L495 AbstractCegarLoop]: Abstraction has has 366 places, 519 transitions, 7904 flow [2024-06-03 20:37:00,218 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) [2024-06-03 20:37:00,218 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:00,218 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:00,218 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable121 [2024-06-03 20:37:00,218 INFO L420 AbstractCegarLoop]: === Iteration 123 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:00,219 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:00,219 INFO L85 PathProgramCache]: Analyzing trace with hash -1013382765, now seen corresponding path program 11 times [2024-06-03 20:37:00,219 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:00,219 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1511207340] [2024-06-03 20:37:00,219 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:00,219 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:00,225 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:00,554 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:00,555 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:00,555 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1511207340] [2024-06-03 20:37:00,555 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1511207340] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:00,555 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:00,555 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:00,555 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1036639332] [2024-06-03 20:37:00,555 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:00,556 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:00,556 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:00,556 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:00,556 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=18, Invalid=38, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:00,597 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:00,597 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) [2024-06-03 20:37:00,597 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:00,598 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:00,598 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:01,602 INFO L124 PetriNetUnfolderBase]: 2652/4461 cut-off events. [2024-06-03 20:37:01,602 INFO L125 PetriNetUnfolderBase]: For 454273/454279 co-relation queries the response was YES. [2024-06-03 20:37:01,641 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. [2024-06-03 20:37:01,655 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 456 selfloop transitions, 77 changer transitions 0/539 dead transitions. [2024-06-03 20:37:01,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 372 places, 539 transitions, 9020 flow [2024-06-03 20:37:01,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:37:01,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:37:01,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 162 transitions. [2024-06-03 20:37:01,657 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5644599303135889 [2024-06-03 20:37:01,657 INFO L175 Difference]: Start difference. First operand has 366 places, 519 transitions, 7904 flow. Second operand 7 states and 162 transitions. [2024-06-03 20:37:01,657 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 372 places, 539 transitions, 9020 flow [2024-06-03 20:37:03,978 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 539 transitions, 8898 flow, removed 53 selfloop flow, removed 2 redundant places. [2024-06-03 20:37:03,984 INFO L231 Difference]: Finished difference. Result has 371 places, 519 transitions, 7942 flow [2024-06-03 20:37:03,984 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} [2024-06-03 20:37:03,985 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-03 20:37:03,985 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 519 transitions, 7942 flow [2024-06-03 20:37:03,985 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) [2024-06-03 20:37:03,985 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:03,985 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:03,985 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable122 [2024-06-03 20:37:03,985 INFO L420 AbstractCegarLoop]: === Iteration 124 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:03,986 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:03,986 INFO L85 PathProgramCache]: Analyzing trace with hash -1021155891, now seen corresponding path program 17 times [2024-06-03 20:37:03,986 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:03,986 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1207221324] [2024-06-03 20:37:03,986 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:03,986 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:03,992 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:04,334 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:04,335 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:04,335 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1207221324] [2024-06-03 20:37:04,335 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1207221324] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:04,335 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:04,335 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:04,335 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [673172654] [2024-06-03 20:37:04,335 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:04,335 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:04,336 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:04,336 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:04,336 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:04,388 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:04,388 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) [2024-06-03 20:37:04,388 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:04,388 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:04,388 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:05,228 INFO L124 PetriNetUnfolderBase]: 2646/4453 cut-off events. [2024-06-03 20:37:05,228 INFO L125 PetriNetUnfolderBase]: For 449662/449668 co-relation queries the response was YES. [2024-06-03 20:37:05,272 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. [2024-06-03 20:37:05,288 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 438 selfloop transitions, 108 changer transitions 0/552 dead transitions. [2024-06-03 20:37:05,288 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 377 places, 552 transitions, 9560 flow [2024-06-03 20:37:05,289 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:37:05,289 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:37:05,289 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 176 transitions. [2024-06-03 20:37:05,289 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6132404181184669 [2024-06-03 20:37:05,289 INFO L175 Difference]: Start difference. First operand has 371 places, 519 transitions, 7942 flow. Second operand 7 states and 176 transitions. [2024-06-03 20:37:05,289 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 377 places, 552 transitions, 9560 flow [2024-06-03 20:37:07,467 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 370 places, 552 transitions, 9266 flow, removed 26 selfloop flow, removed 7 redundant places. [2024-06-03 20:37:07,474 INFO L231 Difference]: Finished difference. Result has 371 places, 519 transitions, 7892 flow [2024-06-03 20:37:07,474 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} [2024-06-03 20:37:07,474 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 329 predicate places. [2024-06-03 20:37:07,474 INFO L495 AbstractCegarLoop]: Abstraction has has 371 places, 519 transitions, 7892 flow [2024-06-03 20:37:07,474 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) [2024-06-03 20:37:07,475 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:07,475 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:07,475 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable123 [2024-06-03 20:37:07,475 INFO L420 AbstractCegarLoop]: === Iteration 125 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:07,475 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:07,475 INFO L85 PathProgramCache]: Analyzing trace with hash 1103414459, now seen corresponding path program 17 times [2024-06-03 20:37:07,475 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:07,476 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [309441083] [2024-06-03 20:37:07,476 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:07,476 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:07,487 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:07,809 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:07,810 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:07,810 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [309441083] [2024-06-03 20:37:07,810 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [309441083] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:07,810 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:07,810 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:37:07,810 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1647861851] [2024-06-03 20:37:07,810 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:07,810 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:37:07,811 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:07,811 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:37:07,811 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:37:07,859 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:07,860 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) [2024-06-03 20:37:07,860 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:07,860 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:07,860 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:08,686 INFO L124 PetriNetUnfolderBase]: 2648/4460 cut-off events. [2024-06-03 20:37:08,686 INFO L125 PetriNetUnfolderBase]: For 445677/445683 co-relation queries the response was YES. [2024-06-03 20:37:08,731 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. [2024-06-03 20:37:08,748 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 467 selfloop transitions, 78 changer transitions 0/551 dead transitions. [2024-06-03 20:37:08,748 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 376 places, 551 transitions, 9358 flow [2024-06-03 20:37:08,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:37:08,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:37:08,749 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 155 transitions. [2024-06-03 20:37:08,749 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6300813008130082 [2024-06-03 20:37:08,749 INFO L175 Difference]: Start difference. First operand has 371 places, 519 transitions, 7892 flow. Second operand 6 states and 155 transitions. [2024-06-03 20:37:08,749 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 376 places, 551 transitions, 9358 flow [2024-06-03 20:37:11,300 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 372 places, 551 transitions, 9216 flow, removed 2 selfloop flow, removed 4 redundant places. [2024-06-03 20:37:11,306 INFO L231 Difference]: Finished difference. Result has 374 places, 525 transitions, 8092 flow [2024-06-03 20:37:11,306 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} [2024-06-03 20:37:11,306 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 332 predicate places. [2024-06-03 20:37:11,307 INFO L495 AbstractCegarLoop]: Abstraction has has 374 places, 525 transitions, 8092 flow [2024-06-03 20:37:11,307 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) [2024-06-03 20:37:11,307 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:11,307 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] [2024-06-03 20:37:11,307 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable124 [2024-06-03 20:37:11,307 INFO L420 AbstractCegarLoop]: === Iteration 126 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:11,308 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:11,308 INFO L85 PathProgramCache]: Analyzing trace with hash -1021150497, now seen corresponding path program 18 times [2024-06-03 20:37:11,308 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:11,308 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [308150126] [2024-06-03 20:37:11,308 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:11,308 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:11,315 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:11,625 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:11,626 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:11,626 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [308150126] [2024-06-03 20:37:11,626 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [308150126] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:11,626 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:11,626 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:37:11,626 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1817684836] [2024-06-03 20:37:11,626 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:11,627 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:37:11,627 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:11,627 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:37:11,627 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:37:11,659 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:11,659 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) [2024-06-03 20:37:11,659 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:11,659 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:11,660 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:12,585 INFO L124 PetriNetUnfolderBase]: 2642/4448 cut-off events. [2024-06-03 20:37:12,585 INFO L125 PetriNetUnfolderBase]: For 438132/438138 co-relation queries the response was YES. [2024-06-03 20:37:12,624 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. [2024-06-03 20:37:12,638 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 463 selfloop transitions, 78 changer transitions 0/547 dead transitions. [2024-06-03 20:37:12,638 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 379 places, 547 transitions, 9230 flow [2024-06-03 20:37:12,639 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:37:12,639 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:37:12,639 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-03 20:37:12,639 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-03 20:37:12,639 INFO L175 Difference]: Start difference. First operand has 374 places, 525 transitions, 8092 flow. Second operand 6 states and 151 transitions. [2024-06-03 20:37:12,639 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 379 places, 547 transitions, 9230 flow [2024-06-03 20:37:15,075 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 377 places, 547 transitions, 9137 flow, removed 12 selfloop flow, removed 2 redundant places. [2024-06-03 20:37:15,081 INFO L231 Difference]: Finished difference. Result has 378 places, 525 transitions, 8169 flow [2024-06-03 20:37:15,081 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} [2024-06-03 20:37:15,081 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 336 predicate places. [2024-06-03 20:37:15,081 INFO L495 AbstractCegarLoop]: Abstraction has has 378 places, 525 transitions, 8169 flow [2024-06-03 20:37:15,082 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) [2024-06-03 20:37:15,082 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:15,082 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:15,082 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable125 [2024-06-03 20:37:15,082 INFO L420 AbstractCegarLoop]: === Iteration 127 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:15,083 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:15,083 INFO L85 PathProgramCache]: Analyzing trace with hash 2098460679, now seen corresponding path program 18 times [2024-06-03 20:37:15,083 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:15,083 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [66055513] [2024-06-03 20:37:15,083 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:15,083 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:15,096 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:15,395 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:15,396 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:15,396 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [66055513] [2024-06-03 20:37:15,396 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [66055513] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:15,396 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:15,396 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:15,396 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [7656980] [2024-06-03 20:37:15,396 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:15,396 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:15,396 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:15,402 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:15,402 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:15,458 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:15,458 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) [2024-06-03 20:37:15,458 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:15,458 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:15,458 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:16,289 INFO L124 PetriNetUnfolderBase]: 2652/4466 cut-off events. [2024-06-03 20:37:16,290 INFO L125 PetriNetUnfolderBase]: For 444312/444318 co-relation queries the response was YES. [2024-06-03 20:37:16,335 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. [2024-06-03 20:37:16,351 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 458 selfloop transitions, 88 changer transitions 0/552 dead transitions. [2024-06-03 20:37:16,351 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 385 places, 552 transitions, 9414 flow [2024-06-03 20:37:16,352 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:37:16,352 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:37:16,352 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 20:37:16,352 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 20:37:16,352 INFO L175 Difference]: Start difference. First operand has 378 places, 525 transitions, 8169 flow. Second operand 8 states and 180 transitions. [2024-06-03 20:37:16,352 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 385 places, 552 transitions, 9414 flow [2024-06-03 20:37:18,132 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 380 places, 552 transitions, 9225 flow, removed 0 selfloop flow, removed 5 redundant places. [2024-06-03 20:37:18,138 INFO L231 Difference]: Finished difference. Result has 381 places, 531 transitions, 8269 flow [2024-06-03 20:37:18,138 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} [2024-06-03 20:37:18,139 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 339 predicate places. [2024-06-03 20:37:18,139 INFO L495 AbstractCegarLoop]: Abstraction has has 381 places, 531 transitions, 8269 flow [2024-06-03 20:37:18,139 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) [2024-06-03 20:37:18,139 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:18,139 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:18,141 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable126 [2024-06-03 20:37:18,141 INFO L420 AbstractCegarLoop]: === Iteration 128 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:18,141 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:18,141 INFO L85 PathProgramCache]: Analyzing trace with hash -1533890331, now seen corresponding path program 19 times [2024-06-03 20:37:18,143 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:18,143 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1837764928] [2024-06-03 20:37:18,144 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:18,146 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:18,169 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:18,467 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:18,468 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:18,469 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1837764928] [2024-06-03 20:37:18,470 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1837764928] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:18,471 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:18,471 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:37:18,472 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2113762742] [2024-06-03 20:37:18,472 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:18,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:37:18,473 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:18,475 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:37:18,475 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:37:18,507 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:18,507 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) [2024-06-03 20:37:18,507 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:18,507 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:18,508 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:19,353 INFO L124 PetriNetUnfolderBase]: 2654/4471 cut-off events. [2024-06-03 20:37:19,353 INFO L125 PetriNetUnfolderBase]: For 451944/451950 co-relation queries the response was YES. [2024-06-03 20:37:19,400 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. [2024-06-03 20:37:19,416 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 436 selfloop transitions, 126 changer transitions 0/568 dead transitions. [2024-06-03 20:37:19,417 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 388 places, 568 transitions, 9714 flow [2024-06-03 20:37:19,418 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:37:19,418 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:37:19,419 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 199 transitions. [2024-06-03 20:37:19,419 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6067073170731707 [2024-06-03 20:37:19,420 INFO L175 Difference]: Start difference. First operand has 381 places, 531 transitions, 8269 flow. Second operand 8 states and 199 transitions. [2024-06-03 20:37:19,420 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 388 places, 568 transitions, 9714 flow [2024-06-03 20:37:21,401 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 383 places, 568 transitions, 9500 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 20:37:21,407 INFO L231 Difference]: Finished difference. Result has 384 places, 534 transitions, 8382 flow [2024-06-03 20:37:21,407 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} [2024-06-03 20:37:21,408 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 342 predicate places. [2024-06-03 20:37:21,408 INFO L495 AbstractCegarLoop]: Abstraction has has 384 places, 534 transitions, 8382 flow [2024-06-03 20:37:21,409 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) [2024-06-03 20:37:21,409 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:21,409 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:21,410 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable127 [2024-06-03 20:37:21,410 INFO L420 AbstractCegarLoop]: === Iteration 129 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:21,411 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:21,411 INFO L85 PathProgramCache]: Analyzing trace with hash -1526652885, now seen corresponding path program 19 times [2024-06-03 20:37:21,411 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:21,411 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1702916331] [2024-06-03 20:37:21,411 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:21,411 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:21,418 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:21,702 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:21,703 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:21,703 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1702916331] [2024-06-03 20:37:21,703 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1702916331] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:21,703 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:21,703 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:21,703 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1956885795] [2024-06-03 20:37:21,703 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:21,704 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:21,704 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:21,704 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:21,704 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:21,745 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:21,746 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) [2024-06-03 20:37:21,746 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:21,746 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:21,746 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:22,697 INFO L124 PetriNetUnfolderBase]: 2683/4520 cut-off events. [2024-06-03 20:37:22,698 INFO L125 PetriNetUnfolderBase]: For 470879/470885 co-relation queries the response was YES. [2024-06-03 20:37:22,738 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. [2024-06-03 20:37:22,752 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 383 selfloop transitions, 182 changer transitions 0/571 dead transitions. [2024-06-03 20:37:22,752 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 391 places, 571 transitions, 10572 flow [2024-06-03 20:37:22,753 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:37:22,753 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:37:22,753 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 20:37:22,753 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-03 20:37:22,753 INFO L175 Difference]: Start difference. First operand has 384 places, 534 transitions, 8382 flow. Second operand 8 states and 189 transitions. [2024-06-03 20:37:22,753 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 391 places, 571 transitions, 10572 flow [2024-06-03 20:37:24,647 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 384 places, 571 transitions, 10320 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 20:37:24,654 INFO L231 Difference]: Finished difference. Result has 386 places, 546 transitions, 8875 flow [2024-06-03 20:37:24,654 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} [2024-06-03 20:37:24,655 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 344 predicate places. [2024-06-03 20:37:24,655 INFO L495 AbstractCegarLoop]: Abstraction has has 386 places, 546 transitions, 8875 flow [2024-06-03 20:37:24,655 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) [2024-06-03 20:37:24,655 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:24,655 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:24,655 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable128 [2024-06-03 20:37:24,655 INFO L420 AbstractCegarLoop]: === Iteration 130 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:24,655 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:24,656 INFO L85 PathProgramCache]: Analyzing trace with hash -1537614795, now seen corresponding path program 20 times [2024-06-03 20:37:24,656 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:24,656 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [396845262] [2024-06-03 20:37:24,656 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:24,656 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:24,663 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:24,953 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:24,953 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:24,953 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [396845262] [2024-06-03 20:37:24,953 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [396845262] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:24,953 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:24,953 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:24,954 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1332658643] [2024-06-03 20:37:24,954 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:24,954 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:24,954 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:24,954 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:24,954 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:25,004 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:25,004 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) [2024-06-03 20:37:25,004 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:25,004 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:25,004 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:25,880 INFO L124 PetriNetUnfolderBase]: 2688/4526 cut-off events. [2024-06-03 20:37:25,880 INFO L125 PetriNetUnfolderBase]: For 464710/464716 co-relation queries the response was YES. [2024-06-03 20:37:25,929 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. [2024-06-03 20:37:25,948 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 383 selfloop transitions, 193 changer transitions 0/582 dead transitions. [2024-06-03 20:37:25,948 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 393 places, 582 transitions, 10735 flow [2024-06-03 20:37:25,949 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:37:25,949 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:37:25,949 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 197 transitions. [2024-06-03 20:37:25,949 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.600609756097561 [2024-06-03 20:37:25,949 INFO L175 Difference]: Start difference. First operand has 386 places, 546 transitions, 8875 flow. Second operand 8 states and 197 transitions. [2024-06-03 20:37:25,949 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 393 places, 582 transitions, 10735 flow [2024-06-03 20:37:28,408 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 582 transitions, 10288 flow, removed 60 selfloop flow, removed 4 redundant places. [2024-06-03 20:37:28,414 INFO L231 Difference]: Finished difference. Result has 390 places, 549 transitions, 8888 flow [2024-06-03 20:37:28,414 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} [2024-06-03 20:37:28,415 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-03 20:37:28,415 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 549 transitions, 8888 flow [2024-06-03 20:37:28,415 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) [2024-06-03 20:37:28,415 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:28,415 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:28,415 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable129 [2024-06-03 20:37:28,415 INFO L420 AbstractCegarLoop]: === Iteration 131 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:28,416 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:28,416 INFO L85 PathProgramCache]: Analyzing trace with hash -1537614981, now seen corresponding path program 20 times [2024-06-03 20:37:28,416 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:28,416 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [514636069] [2024-06-03 20:37:28,416 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:28,416 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:28,424 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:28,710 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:28,711 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:28,711 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [514636069] [2024-06-03 20:37:28,711 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [514636069] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:28,711 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:28,711 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:37:28,711 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [535271503] [2024-06-03 20:37:28,711 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:28,713 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:37:28,713 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:28,713 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:37:28,713 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=25, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:37:28,743 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:28,743 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) [2024-06-03 20:37:28,743 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:28,743 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:28,743 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:29,591 INFO L124 PetriNetUnfolderBase]: 2682/4518 cut-off events. [2024-06-03 20:37:29,591 INFO L125 PetriNetUnfolderBase]: For 468409/468415 co-relation queries the response was YES. [2024-06-03 20:37:29,638 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. [2024-06-03 20:37:29,655 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 444 selfloop transitions, 129 changer transitions 0/579 dead transitions. [2024-06-03 20:37:29,655 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 579 transitions, 10298 flow [2024-06-03 20:37:29,656 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:37:29,656 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:37:29,656 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 177 transitions. [2024-06-03 20:37:29,656 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6167247386759582 [2024-06-03 20:37:29,656 INFO L175 Difference]: Start difference. First operand has 390 places, 549 transitions, 8888 flow. Second operand 7 states and 177 transitions. [2024-06-03 20:37:29,656 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 579 transitions, 10298 flow [2024-06-03 20:37:31,801 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 579 transitions, 9645 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 20:37:31,808 INFO L231 Difference]: Finished difference. Result has 390 places, 549 transitions, 8507 flow [2024-06-03 20:37:31,808 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} [2024-06-03 20:37:31,808 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-03 20:37:31,808 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 549 transitions, 8507 flow [2024-06-03 20:37:31,808 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) [2024-06-03 20:37:31,808 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:31,809 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:31,809 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable130 [2024-06-03 20:37:31,809 INFO L420 AbstractCegarLoop]: === Iteration 132 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:31,809 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:31,809 INFO L85 PathProgramCache]: Analyzing trace with hash 2050747897, now seen corresponding path program 21 times [2024-06-03 20:37:31,809 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:31,809 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [216839818] [2024-06-03 20:37:31,809 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:31,810 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:31,817 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:32,100 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:32,101 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:32,101 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [216839818] [2024-06-03 20:37:32,101 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [216839818] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:32,101 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:32,101 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:32,101 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [770009223] [2024-06-03 20:37:32,101 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:32,101 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:32,102 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:32,102 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:32,102 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:32,147 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:32,147 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) [2024-06-03 20:37:32,147 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:32,147 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:32,147 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:33,104 INFO L124 PetriNetUnfolderBase]: 2679/4514 cut-off events. [2024-06-03 20:37:33,104 INFO L125 PetriNetUnfolderBase]: For 464908/464914 co-relation queries the response was YES. [2024-06-03 20:37:33,146 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. [2024-06-03 20:37:33,161 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 381 selfloop transitions, 192 changer transitions 0/579 dead transitions. [2024-06-03 20:37:33,161 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 579 transitions, 10297 flow [2024-06-03 20:37:33,162 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:37:33,162 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:37:33,162 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 194 transitions. [2024-06-03 20:37:33,162 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5914634146341463 [2024-06-03 20:37:33,162 INFO L175 Difference]: Start difference. First operand has 390 places, 549 transitions, 8507 flow. Second operand 8 states and 194 transitions. [2024-06-03 20:37:33,162 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 579 transitions, 10297 flow [2024-06-03 20:37:35,805 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 390 places, 579 transitions, 9909 flow, removed 30 selfloop flow, removed 7 redundant places. [2024-06-03 20:37:35,811 INFO L231 Difference]: Finished difference. Result has 391 places, 549 transitions, 8515 flow [2024-06-03 20:37:35,811 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} [2024-06-03 20:37:35,812 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-03 20:37:35,812 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 549 transitions, 8515 flow [2024-06-03 20:37:35,812 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) [2024-06-03 20:37:35,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:35,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:35,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable131 [2024-06-03 20:37:35,812 INFO L420 AbstractCegarLoop]: === Iteration 133 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:35,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:35,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2091097869, now seen corresponding path program 22 times [2024-06-03 20:37:35,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:35,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1848625920] [2024-06-03 20:37:35,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:35,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:35,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:36,139 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:36,139 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:36,139 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1848625920] [2024-06-03 20:37:36,139 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1848625920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:36,139 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:36,140 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:36,140 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [745722740] [2024-06-03 20:37:36,140 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:36,140 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:36,140 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:36,140 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:36,140 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:36,176 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:36,176 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) [2024-06-03 20:37:36,176 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:36,176 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:36,176 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:37,144 INFO L124 PetriNetUnfolderBase]: 2676/4510 cut-off events. [2024-06-03 20:37:37,144 INFO L125 PetriNetUnfolderBase]: For 460388/460394 co-relation queries the response was YES. [2024-06-03 20:37:37,191 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. [2024-06-03 20:37:37,210 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 468 selfloop transitions, 103 changer transitions 0/577 dead transitions. [2024-06-03 20:37:37,211 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 398 places, 577 transitions, 9917 flow [2024-06-03 20:37:37,211 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:37:37,211 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:37:37,211 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 20:37:37,211 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-03 20:37:37,212 INFO L175 Difference]: Start difference. First operand has 391 places, 549 transitions, 8515 flow. Second operand 8 states and 189 transitions. [2024-06-03 20:37:37,212 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 398 places, 577 transitions, 9917 flow [2024-06-03 20:37:40,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 391 places, 577 transitions, 9470 flow, removed 15 selfloop flow, removed 7 redundant places. [2024-06-03 20:37:40,020 INFO L231 Difference]: Finished difference. Result has 392 places, 549 transitions, 8280 flow [2024-06-03 20:37:40,021 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} [2024-06-03 20:37:40,021 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 350 predicate places. [2024-06-03 20:37:40,021 INFO L495 AbstractCegarLoop]: Abstraction has has 392 places, 549 transitions, 8280 flow [2024-06-03 20:37:40,021 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) [2024-06-03 20:37:40,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:40,022 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] [2024-06-03 20:37:40,022 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable132 [2024-06-03 20:37:40,022 INFO L420 AbstractCegarLoop]: === Iteration 134 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:40,022 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:40,022 INFO L85 PathProgramCache]: Analyzing trace with hash 2091097683, now seen corresponding path program 21 times [2024-06-03 20:37:40,022 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:40,022 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1453405033] [2024-06-03 20:37:40,023 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:40,023 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:40,029 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:40,329 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:40,329 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:40,330 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1453405033] [2024-06-03 20:37:40,330 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1453405033] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:40,330 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:40,330 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [5] imperfect sequences [] total 5 [2024-06-03 20:37:40,330 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [331950346] [2024-06-03 20:37:40,330 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:40,330 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 7 states [2024-06-03 20:37:40,330 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:40,331 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 7 interpolants. [2024-06-03 20:37:40,331 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=14, Invalid=28, Unknown=0, NotChecked=0, Total=42 [2024-06-03 20:37:40,373 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:40,374 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) [2024-06-03 20:37:40,374 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:40,374 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:40,374 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:41,269 INFO L124 PetriNetUnfolderBase]: 2670/4502 cut-off events. [2024-06-03 20:37:41,269 INFO L125 PetriNetUnfolderBase]: For 462408/462414 co-relation queries the response was YES. [2024-06-03 20:37:41,322 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. [2024-06-03 20:37:41,341 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 451 selfloop transitions, 117 changer transitions 0/574 dead transitions. [2024-06-03 20:37:41,341 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 397 places, 574 transitions, 9480 flow [2024-06-03 20:37:41,342 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:37:41,342 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:37:41,342 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 154 transitions. [2024-06-03 20:37:41,342 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6260162601626016 [2024-06-03 20:37:41,342 INFO L175 Difference]: Start difference. First operand has 392 places, 549 transitions, 8280 flow. Second operand 6 states and 154 transitions. [2024-06-03 20:37:41,342 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 397 places, 574 transitions, 9480 flow [2024-06-03 20:37:43,627 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 574 transitions, 9156 flow, removed 6 selfloop flow, removed 8 redundant places. [2024-06-03 20:37:43,633 INFO L231 Difference]: Finished difference. Result has 390 places, 549 transitions, 8216 flow [2024-06-03 20:37:43,633 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} [2024-06-03 20:37:43,634 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 348 predicate places. [2024-06-03 20:37:43,634 INFO L495 AbstractCegarLoop]: Abstraction has has 390 places, 549 transitions, 8216 flow [2024-06-03 20:37:43,634 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) [2024-06-03 20:37:43,634 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:43,634 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:43,634 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable133 [2024-06-03 20:37:43,634 INFO L420 AbstractCegarLoop]: === Iteration 135 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:43,634 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:43,635 INFO L85 PathProgramCache]: Analyzing trace with hash 2091109029, now seen corresponding path program 23 times [2024-06-03 20:37:43,635 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:43,635 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1113347974] [2024-06-03 20:37:43,635 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:43,635 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:43,642 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:43,932 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:43,932 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:43,933 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1113347974] [2024-06-03 20:37:43,933 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1113347974] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:43,933 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:43,933 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:43,933 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [242190747] [2024-06-03 20:37:43,933 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:43,933 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:43,933 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:43,934 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:43,934 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:43,989 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:43,989 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) [2024-06-03 20:37:43,989 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:43,989 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:43,989 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:44,902 INFO L124 PetriNetUnfolderBase]: 2667/4498 cut-off events. [2024-06-03 20:37:44,902 INFO L125 PetriNetUnfolderBase]: For 462029/462035 co-relation queries the response was YES. [2024-06-03 20:37:44,944 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. [2024-06-03 20:37:44,959 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 468 selfloop transitions, 104 changer transitions 0/578 dead transitions. [2024-06-03 20:37:44,959 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 578 transitions, 9432 flow [2024-06-03 20:37:44,960 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:37:44,960 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:37:44,960 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-03 20:37:44,960 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414634146341464 [2024-06-03 20:37:44,960 INFO L175 Difference]: Start difference. First operand has 390 places, 549 transitions, 8216 flow. Second operand 10 states and 222 transitions. [2024-06-03 20:37:44,960 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 578 transitions, 9432 flow [2024-06-03 20:37:47,283 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 392 places, 578 transitions, 9150 flow, removed 14 selfloop flow, removed 7 redundant places. [2024-06-03 20:37:47,290 INFO L231 Difference]: Finished difference. Result has 393 places, 549 transitions, 8148 flow [2024-06-03 20:37:47,290 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} [2024-06-03 20:37:47,290 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 351 predicate places. [2024-06-03 20:37:47,290 INFO L495 AbstractCegarLoop]: Abstraction has has 393 places, 549 transitions, 8148 flow [2024-06-03 20:37:47,290 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) [2024-06-03 20:37:47,290 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:47,291 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:47,291 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable134 [2024-06-03 20:37:47,291 INFO L420 AbstractCegarLoop]: === Iteration 136 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:47,291 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:47,291 INFO L85 PathProgramCache]: Analyzing trace with hash 2061869395, now seen corresponding path program 2 times [2024-06-03 20:37:47,291 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:47,291 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1880237189] [2024-06-03 20:37:47,291 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:47,292 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:47,298 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:47,606 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:47,606 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:47,607 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1880237189] [2024-06-03 20:37:47,607 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1880237189] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:47,607 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:47,607 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:47,607 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1973634805] [2024-06-03 20:37:47,607 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:47,607 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:47,607 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:47,608 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:47,608 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:47,668 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:47,669 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) [2024-06-03 20:37:47,669 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:47,669 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:47,669 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:48,529 INFO L124 PetriNetUnfolderBase]: 2687/4533 cut-off events. [2024-06-03 20:37:48,529 INFO L125 PetriNetUnfolderBase]: For 475154/475154 co-relation queries the response was YES. [2024-06-03 20:37:48,577 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. [2024-06-03 20:37:48,593 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 534 selfloop transitions, 36 changer transitions 0/576 dead transitions. [2024-06-03 20:37:48,594 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 399 places, 576 transitions, 9430 flow [2024-06-03 20:37:48,594 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:37:48,594 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:37:48,594 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-03 20:37:48,594 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-03 20:37:48,594 INFO L175 Difference]: Start difference. First operand has 393 places, 549 transitions, 8148 flow. Second operand 7 states and 158 transitions. [2024-06-03 20:37:48,595 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 399 places, 576 transitions, 9430 flow [2024-06-03 20:37:51,808 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 389 places, 576 transitions, 9169 flow, removed 3 selfloop flow, removed 10 redundant places. [2024-06-03 20:37:51,814 INFO L231 Difference]: Finished difference. Result has 391 places, 552 transitions, 8018 flow [2024-06-03 20:37:51,815 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} [2024-06-03 20:37:51,824 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 349 predicate places. [2024-06-03 20:37:51,824 INFO L495 AbstractCegarLoop]: Abstraction has has 391 places, 552 transitions, 8018 flow [2024-06-03 20:37:51,824 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) [2024-06-03 20:37:51,824 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:51,825 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:51,825 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable135 [2024-06-03 20:37:51,825 INFO L420 AbstractCegarLoop]: === Iteration 137 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:51,825 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:51,825 INFO L85 PathProgramCache]: Analyzing trace with hash -1836056659, now seen corresponding path program 3 times [2024-06-03 20:37:51,825 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:51,826 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1389757409] [2024-06-03 20:37:51,826 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:51,826 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:51,833 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:52,259 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:52,259 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:52,260 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1389757409] [2024-06-03 20:37:52,260 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1389757409] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:52,260 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:52,260 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:52,260 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [42385648] [2024-06-03 20:37:52,260 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:52,260 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:52,260 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:52,261 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:52,261 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:52,313 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:52,313 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) [2024-06-03 20:37:52,313 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:52,313 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:52,313 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:53,196 INFO L124 PetriNetUnfolderBase]: 2707/4569 cut-off events. [2024-06-03 20:37:53,197 INFO L125 PetriNetUnfolderBase]: For 484356/484356 co-relation queries the response was YES. [2024-06-03 20:37:53,246 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. [2024-06-03 20:37:53,264 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 544 selfloop transitions, 31 changer transitions 0/581 dead transitions. [2024-06-03 20:37:53,264 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 396 places, 581 transitions, 9325 flow [2024-06-03 20:37:53,264 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:37:53,265 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:37:53,265 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 145 transitions. [2024-06-03 20:37:53,265 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5894308943089431 [2024-06-03 20:37:53,265 INFO L175 Difference]: Start difference. First operand has 391 places, 552 transitions, 8018 flow. Second operand 6 states and 145 transitions. [2024-06-03 20:37:53,265 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 396 places, 581 transitions, 9325 flow [2024-06-03 20:37:55,727 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 393 places, 581 transitions, 9267 flow, removed 11 selfloop flow, removed 3 redundant places. [2024-06-03 20:37:55,733 INFO L231 Difference]: Finished difference. Result has 395 places, 555 transitions, 8093 flow [2024-06-03 20:37:55,733 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} [2024-06-03 20:37:55,738 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 353 predicate places. [2024-06-03 20:37:55,738 INFO L495 AbstractCegarLoop]: Abstraction has has 395 places, 555 transitions, 8093 flow [2024-06-03 20:37:55,738 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) [2024-06-03 20:37:55,738 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:37:55,738 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:37:55,738 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable136 [2024-06-03 20:37:55,738 INFO L420 AbstractCegarLoop]: === Iteration 138 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:37:55,739 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:37:55,739 INFO L85 PathProgramCache]: Analyzing trace with hash 2041080969, now seen corresponding path program 4 times [2024-06-03 20:37:55,739 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:37:55,739 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [431089180] [2024-06-03 20:37:55,739 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:37:55,739 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:37:55,745 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:37:56,058 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:37:56,072 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:37:56,072 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [431089180] [2024-06-03 20:37:56,072 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [431089180] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:37:56,072 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:37:56,073 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:37:56,073 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1960768478] [2024-06-03 20:37:56,073 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:37:56,074 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:37:56,074 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:37:56,074 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:37:56,074 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:37:56,118 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:37:56,119 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) [2024-06-03 20:37:56,119 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:37:56,119 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:37:56,119 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:37:57,064 INFO L124 PetriNetUnfolderBase]: 2694/4548 cut-off events. [2024-06-03 20:37:57,064 INFO L125 PetriNetUnfolderBase]: For 465117/465117 co-relation queries the response was YES. [2024-06-03 20:37:57,111 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. [2024-06-03 20:37:57,126 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 546 selfloop transitions, 35 changer transitions 0/587 dead transitions. [2024-06-03 20:37:57,126 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 401 places, 587 transitions, 9426 flow [2024-06-03 20:37:57,127 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:37:57,127 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:37:57,127 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 163 transitions. [2024-06-03 20:37:57,127 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5679442508710801 [2024-06-03 20:37:57,127 INFO L175 Difference]: Start difference. First operand has 395 places, 555 transitions, 8093 flow. Second operand 7 states and 163 transitions. [2024-06-03 20:37:57,127 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 401 places, 587 transitions, 9426 flow [2024-06-03 20:38:00,458 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 399 places, 587 transitions, 9378 flow, removed 11 selfloop flow, removed 2 redundant places. [2024-06-03 20:38:00,465 INFO L231 Difference]: Finished difference. Result has 402 places, 559 transitions, 8202 flow [2024-06-03 20:38:00,465 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} [2024-06-03 20:38:00,466 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 360 predicate places. [2024-06-03 20:38:00,466 INFO L495 AbstractCegarLoop]: Abstraction has has 402 places, 559 transitions, 8202 flow [2024-06-03 20:38:00,466 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) [2024-06-03 20:38:00,466 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:00,466 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:00,466 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable137 [2024-06-03 20:38:00,466 INFO L420 AbstractCegarLoop]: === Iteration 139 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:38:00,466 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:00,467 INFO L85 PathProgramCache]: Analyzing trace with hash 744438695, now seen corresponding path program 1 times [2024-06-03 20:38:00,467 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:00,467 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [180136410] [2024-06-03 20:38:00,467 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:00,467 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:00,473 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:00,781 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:00,781 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:00,781 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [180136410] [2024-06-03 20:38:00,781 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [180136410] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:00,781 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:00,782 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:38:00,782 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [462037511] [2024-06-03 20:38:00,782 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:00,782 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:38:00,782 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:00,782 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:38:00,782 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:38:00,831 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:00,831 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) [2024-06-03 20:38:00,832 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:00,832 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:00,832 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:01,760 INFO L124 PetriNetUnfolderBase]: 2780/4698 cut-off events. [2024-06-03 20:38:01,760 INFO L125 PetriNetUnfolderBase]: For 548301/548318 co-relation queries the response was YES. [2024-06-03 20:38:01,814 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. [2024-06-03 20:38:01,832 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 430 selfloop transitions, 152 changer transitions 0/588 dead transitions. [2024-06-03 20:38:01,832 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 408 places, 588 transitions, 9718 flow [2024-06-03 20:38:01,832 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:38:01,833 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:38:01,833 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 20:38:01,833 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-03 20:38:01,833 INFO L175 Difference]: Start difference. First operand has 402 places, 559 transitions, 8202 flow. Second operand 7 states and 165 transitions. [2024-06-03 20:38:01,833 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 408 places, 588 transitions, 9718 flow [2024-06-03 20:38:04,966 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 403 places, 588 transitions, 9561 flow, removed 22 selfloop flow, removed 5 redundant places. [2024-06-03 20:38:04,972 INFO L231 Difference]: Finished difference. Result has 404 places, 562 transitions, 8414 flow [2024-06-03 20:38:04,973 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} [2024-06-03 20:38:04,973 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 362 predicate places. [2024-06-03 20:38:04,973 INFO L495 AbstractCegarLoop]: Abstraction has has 404 places, 562 transitions, 8414 flow [2024-06-03 20:38:04,973 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) [2024-06-03 20:38:04,973 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:04,973 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:04,973 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable138 [2024-06-03 20:38:04,974 INFO L420 AbstractCegarLoop]: === Iteration 140 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:38:04,974 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:04,974 INFO L85 PathProgramCache]: Analyzing trace with hash -208587725, now seen corresponding path program 2 times [2024-06-03 20:38:04,974 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:04,974 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1644335874] [2024-06-03 20:38:04,974 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:04,974 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:04,989 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:05,343 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:05,344 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:05,344 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1644335874] [2024-06-03 20:38:05,344 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1644335874] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:05,344 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:05,344 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:38:05,344 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1866235906] [2024-06-03 20:38:05,344 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:05,345 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:38:05,345 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:05,345 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:38:05,345 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:38:05,403 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:05,403 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) [2024-06-03 20:38:05,403 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:05,403 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:05,403 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:06,318 INFO L124 PetriNetUnfolderBase]: 2836/4794 cut-off events. [2024-06-03 20:38:06,319 INFO L125 PetriNetUnfolderBase]: For 581561/581578 co-relation queries the response was YES. [2024-06-03 20:38:06,370 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. [2024-06-03 20:38:06,388 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 436 selfloop transitions, 140 changer transitions 0/582 dead transitions. [2024-06-03 20:38:06,388 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 410 places, 582 transitions, 9672 flow [2024-06-03 20:38:06,389 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:38:06,389 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:38:06,389 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 158 transitions. [2024-06-03 20:38:06,390 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5505226480836237 [2024-06-03 20:38:06,390 INFO L175 Difference]: Start difference. First operand has 404 places, 562 transitions, 8414 flow. Second operand 7 states and 158 transitions. [2024-06-03 20:38:06,390 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 410 places, 582 transitions, 9672 flow [2024-06-03 20:38:09,500 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 406 places, 582 transitions, 9385 flow, removed 18 selfloop flow, removed 4 redundant places. [2024-06-03 20:38:09,506 INFO L231 Difference]: Finished difference. Result has 407 places, 564 transitions, 8457 flow [2024-06-03 20:38:09,506 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} [2024-06-03 20:38:09,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 365 predicate places. [2024-06-03 20:38:09,507 INFO L495 AbstractCegarLoop]: Abstraction has has 407 places, 564 transitions, 8457 flow [2024-06-03 20:38:09,507 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) [2024-06-03 20:38:09,507 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:09,507 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:09,507 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable139 [2024-06-03 20:38:09,507 INFO L420 AbstractCegarLoop]: === Iteration 141 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:38:09,508 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:09,508 INFO L85 PathProgramCache]: Analyzing trace with hash -208735595, now seen corresponding path program 3 times [2024-06-03 20:38:09,508 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:09,508 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1870388650] [2024-06-03 20:38:09,508 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:09,508 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:09,514 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:09,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:09,845 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:09,845 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1870388650] [2024-06-03 20:38:09,845 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1870388650] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:09,845 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:09,845 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:38:09,845 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1782617935] [2024-06-03 20:38:09,845 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:09,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:38:09,846 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:09,846 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:38:09,847 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:38:09,898 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:09,898 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) [2024-06-03 20:38:09,898 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:09,898 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:09,899 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:10,807 INFO L124 PetriNetUnfolderBase]: 2876/4858 cut-off events. [2024-06-03 20:38:10,807 INFO L125 PetriNetUnfolderBase]: For 573066/573083 co-relation queries the response was YES. [2024-06-03 20:38:10,862 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. [2024-06-03 20:38:10,881 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 437 selfloop transitions, 144 changer transitions 0/587 dead transitions. [2024-06-03 20:38:10,881 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 413 places, 587 transitions, 9745 flow [2024-06-03 20:38:10,881 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:38:10,881 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:38:10,882 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 161 transitions. [2024-06-03 20:38:10,882 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:38:10,882 INFO L175 Difference]: Start difference. First operand has 407 places, 564 transitions, 8457 flow. Second operand 7 states and 161 transitions. [2024-06-03 20:38:10,882 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 413 places, 587 transitions, 9745 flow [2024-06-03 20:38:14,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 408 places, 587 transitions, 9447 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:38:14,037 INFO L231 Difference]: Finished difference. Result has 409 places, 566 transitions, 8498 flow [2024-06-03 20:38:14,037 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} [2024-06-03 20:38:14,037 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 367 predicate places. [2024-06-03 20:38:14,037 INFO L495 AbstractCegarLoop]: Abstraction has has 409 places, 566 transitions, 8498 flow [2024-06-03 20:38:14,038 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) [2024-06-03 20:38:14,038 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:14,038 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:14,038 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable140 [2024-06-03 20:38:14,038 INFO L420 AbstractCegarLoop]: === Iteration 142 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:38:14,038 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:14,038 INFO L85 PathProgramCache]: Analyzing trace with hash -1013373837, now seen corresponding path program 4 times [2024-06-03 20:38:14,038 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:14,039 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1767521945] [2024-06-03 20:38:14,039 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:14,039 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:14,045 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:14,382 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:14,383 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:14,383 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1767521945] [2024-06-03 20:38:14,383 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1767521945] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:14,383 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:14,383 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:38:14,383 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [617857485] [2024-06-03 20:38:14,383 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:14,384 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:38:14,384 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:14,384 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:38:14,384 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:38:14,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:14,431 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) [2024-06-03 20:38:14,431 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:14,431 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:14,431 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:15,428 INFO L124 PetriNetUnfolderBase]: 2919/4926 cut-off events. [2024-06-03 20:38:15,428 INFO L125 PetriNetUnfolderBase]: For 591009/591015 co-relation queries the response was YES. [2024-06-03 20:38:15,479 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. [2024-06-03 20:38:15,495 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 501 selfloop transitions, 85 changer transitions 0/592 dead transitions. [2024-06-03 20:38:15,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 415 places, 592 transitions, 9798 flow [2024-06-03 20:38:15,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:38:15,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:38:15,496 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 165 transitions. [2024-06-03 20:38:15,496 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5749128919860628 [2024-06-03 20:38:15,497 INFO L175 Difference]: Start difference. First operand has 409 places, 566 transitions, 8498 flow. Second operand 7 states and 165 transitions. [2024-06-03 20:38:15,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 415 places, 592 transitions, 9798 flow [2024-06-03 20:38:19,276 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 410 places, 592 transitions, 9483 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:38:19,282 INFO L231 Difference]: Finished difference. Result has 411 places, 568 transitions, 8411 flow [2024-06-03 20:38:19,283 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} [2024-06-03 20:38:19,283 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 369 predicate places. [2024-06-03 20:38:19,283 INFO L495 AbstractCegarLoop]: Abstraction has has 411 places, 568 transitions, 8411 flow [2024-06-03 20:38:19,283 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) [2024-06-03 20:38:19,283 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:19,284 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:19,284 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable141 [2024-06-03 20:38:19,284 INFO L420 AbstractCegarLoop]: === Iteration 143 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:38:19,284 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:19,284 INFO L85 PathProgramCache]: Analyzing trace with hash -1013521707, now seen corresponding path program 5 times [2024-06-03 20:38:19,284 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:19,284 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1454988199] [2024-06-03 20:38:19,284 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:19,285 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:19,291 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:19,630 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:19,631 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:19,631 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1454988199] [2024-06-03 20:38:19,631 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1454988199] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:19,631 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:19,631 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:38:19,631 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [976327738] [2024-06-03 20:38:19,631 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:19,631 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:38:19,632 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:19,632 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:38:19,632 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:38:19,695 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:19,695 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) [2024-06-03 20:38:19,695 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:19,695 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:19,696 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:20,680 INFO L124 PetriNetUnfolderBase]: 2972/5013 cut-off events. [2024-06-03 20:38:20,680 INFO L125 PetriNetUnfolderBase]: For 593396/593402 co-relation queries the response was YES. [2024-06-03 20:38:20,738 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. [2024-06-03 20:38:20,756 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 501 selfloop transitions, 94 changer transitions 0/601 dead transitions. [2024-06-03 20:38:20,757 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 417 places, 601 transitions, 9977 flow [2024-06-03 20:38:20,757 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:38:20,757 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:38:20,757 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 172 transitions. [2024-06-03 20:38:20,757 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5993031358885017 [2024-06-03 20:38:20,758 INFO L175 Difference]: Start difference. First operand has 411 places, 568 transitions, 8411 flow. Second operand 7 states and 172 transitions. [2024-06-03 20:38:20,758 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 417 places, 601 transitions, 9977 flow [2024-06-03 20:38:23,733 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 412 places, 601 transitions, 9783 flow, removed 15 selfloop flow, removed 5 redundant places. [2024-06-03 20:38:23,739 INFO L231 Difference]: Finished difference. Result has 413 places, 570 transitions, 8472 flow [2024-06-03 20:38:23,739 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} [2024-06-03 20:38:23,740 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 371 predicate places. [2024-06-03 20:38:23,740 INFO L495 AbstractCegarLoop]: Abstraction has has 413 places, 570 transitions, 8472 flow [2024-06-03 20:38:23,740 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) [2024-06-03 20:38:23,740 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:23,740 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:23,740 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable142 [2024-06-03 20:38:23,740 INFO L420 AbstractCegarLoop]: === Iteration 144 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:38:23,741 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:23,741 INFO L85 PathProgramCache]: Analyzing trace with hash -1007796255, now seen corresponding path program 1 times [2024-06-03 20:38:23,741 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:23,741 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [106103104] [2024-06-03 20:38:23,741 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:23,741 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:23,747 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:24,088 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:24,088 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:24,088 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [106103104] [2024-06-03 20:38:24,089 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [106103104] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:24,089 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:24,089 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:38:24,089 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [118826136] [2024-06-03 20:38:24,089 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:24,089 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:38:24,089 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:24,089 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:38:24,090 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:38:24,152 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:24,152 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) [2024-06-03 20:38:24,152 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:24,152 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:24,152 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:25,127 INFO L124 PetriNetUnfolderBase]: 2939/4960 cut-off events. [2024-06-03 20:38:25,127 INFO L125 PetriNetUnfolderBase]: For 538776/538782 co-relation queries the response was YES. [2024-06-03 20:38:25,182 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. [2024-06-03 20:38:25,200 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 519 selfloop transitions, 71 changer transitions 0/596 dead transitions. [2024-06-03 20:38:25,200 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 418 places, 596 transitions, 9750 flow [2024-06-03 20:38:25,200 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 6 states. [2024-06-03 20:38:25,200 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 6 states. [2024-06-03 20:38:25,201 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 6 states to 6 states and 151 transitions. [2024-06-03 20:38:25,201 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6138211382113821 [2024-06-03 20:38:25,201 INFO L175 Difference]: Start difference. First operand has 413 places, 570 transitions, 8472 flow. Second operand 6 states and 151 transitions. [2024-06-03 20:38:25,201 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 418 places, 596 transitions, 9750 flow [2024-06-03 20:38:28,248 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 414 places, 596 transitions, 9569 flow, removed 22 selfloop flow, removed 4 redundant places. [2024-06-03 20:38:28,254 INFO L231 Difference]: Finished difference. Result has 415 places, 570 transitions, 8440 flow [2024-06-03 20:38:28,255 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} [2024-06-03 20:38:28,255 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 373 predicate places. [2024-06-03 20:38:28,255 INFO L495 AbstractCegarLoop]: Abstraction has has 415 places, 570 transitions, 8440 flow [2024-06-03 20:38:28,255 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) [2024-06-03 20:38:28,255 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:28,255 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:28,255 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable143 [2024-06-03 20:38:28,256 INFO L420 AbstractCegarLoop]: === Iteration 145 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:38:28,256 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:28,256 INFO L85 PathProgramCache]: Analyzing trace with hash 2037921392, now seen corresponding path program 1 times [2024-06-03 20:38:28,256 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:28,256 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [186480995] [2024-06-03 20:38:28,256 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:28,256 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:28,267 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:28,567 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:28,568 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:28,568 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [186480995] [2024-06-03 20:38:28,568 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [186480995] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:28,568 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:28,568 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:38:28,568 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [857326597] [2024-06-03 20:38:28,568 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:28,569 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:38:28,569 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:28,569 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:38:28,569 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:38:28,617 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:28,617 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) [2024-06-03 20:38:28,618 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:28,618 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:28,618 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:29,606 INFO L124 PetriNetUnfolderBase]: 3006/5040 cut-off events. [2024-06-03 20:38:29,607 INFO L125 PetriNetUnfolderBase]: For 547889/547889 co-relation queries the response was YES. [2024-06-03 20:38:29,664 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. [2024-06-03 20:38:29,683 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 411 selfloop transitions, 197 changer transitions 0/614 dead transitions. [2024-06-03 20:38:29,684 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 422 places, 614 transitions, 10340 flow [2024-06-03 20:38:29,684 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:38:29,684 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:38:29,685 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:38:29,685 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-03 20:38:29,685 INFO L175 Difference]: Start difference. First operand has 415 places, 570 transitions, 8440 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:38:29,685 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 422 places, 614 transitions, 10340 flow [2024-06-03 20:38:33,896 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 417 places, 614 transitions, 10151 flow, removed 9 selfloop flow, removed 5 redundant places. [2024-06-03 20:38:33,904 INFO L231 Difference]: Finished difference. Result has 418 places, 576 transitions, 8798 flow [2024-06-03 20:38:33,904 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} [2024-06-03 20:38:33,904 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 376 predicate places. [2024-06-03 20:38:33,904 INFO L495 AbstractCegarLoop]: Abstraction has has 418 places, 576 transitions, 8798 flow [2024-06-03 20:38:33,904 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) [2024-06-03 20:38:33,905 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:33,905 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:33,905 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable144 [2024-06-03 20:38:33,905 INFO L420 AbstractCegarLoop]: === Iteration 146 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:38:33,905 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:33,905 INFO L85 PathProgramCache]: Analyzing trace with hash 1098394760, now seen corresponding path program 2 times [2024-06-03 20:38:33,905 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:33,905 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [664770268] [2024-06-03 20:38:33,906 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:33,906 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:33,912 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:34,201 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:34,202 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:34,202 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [664770268] [2024-06-03 20:38:34,202 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [664770268] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:34,202 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:34,202 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:38:34,202 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [660189889] [2024-06-03 20:38:34,202 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:34,203 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:38:34,203 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:34,203 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:38:34,203 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:38:34,247 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:34,248 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) [2024-06-03 20:38:34,248 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:34,248 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:34,248 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:35,303 INFO L124 PetriNetUnfolderBase]: 3073/5141 cut-off events. [2024-06-03 20:38:35,303 INFO L125 PetriNetUnfolderBase]: For 616526/616526 co-relation queries the response was YES. [2024-06-03 20:38:35,360 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. [2024-06-03 20:38:35,379 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 411 selfloop transitions, 201 changer transitions 0/618 dead transitions. [2024-06-03 20:38:35,379 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 425 places, 618 transitions, 10696 flow [2024-06-03 20:38:35,379 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:38:35,379 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:38:35,380 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 196 transitions. [2024-06-03 20:38:35,380 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5975609756097561 [2024-06-03 20:38:35,380 INFO L175 Difference]: Start difference. First operand has 418 places, 576 transitions, 8798 flow. Second operand 8 states and 196 transitions. [2024-06-03 20:38:35,380 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 425 places, 618 transitions, 10696 flow [2024-06-03 20:38:38,929 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 422 places, 618 transitions, 10380 flow, removed 50 selfloop flow, removed 3 redundant places. [2024-06-03 20:38:38,936 INFO L231 Difference]: Finished difference. Result has 423 places, 580 transitions, 8993 flow [2024-06-03 20:38:38,936 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} [2024-06-03 20:38:38,936 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 381 predicate places. [2024-06-03 20:38:38,936 INFO L495 AbstractCegarLoop]: Abstraction has has 423 places, 580 transitions, 8993 flow [2024-06-03 20:38:38,936 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) [2024-06-03 20:38:38,937 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:38,937 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:38,937 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable145 [2024-06-03 20:38:38,937 INFO L420 AbstractCegarLoop]: === Iteration 147 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:38:38,937 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:38,937 INFO L85 PathProgramCache]: Analyzing trace with hash 496766866, now seen corresponding path program 3 times [2024-06-03 20:38:38,937 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:38,937 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1145860013] [2024-06-03 20:38:38,938 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:38,938 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:38,944 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:39,243 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:39,244 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:39,244 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1145860013] [2024-06-03 20:38:39,244 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1145860013] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:39,244 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:39,244 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:38:39,244 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1450046714] [2024-06-03 20:38:39,244 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:39,244 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:38:39,245 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:39,245 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:38:39,245 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:38:39,290 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:39,290 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) [2024-06-03 20:38:39,290 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:39,290 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:39,290 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:40,405 INFO L124 PetriNetUnfolderBase]: 3094/5167 cut-off events. [2024-06-03 20:38:40,405 INFO L125 PetriNetUnfolderBase]: For 638783/638783 co-relation queries the response was YES. [2024-06-03 20:38:40,458 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. [2024-06-03 20:38:40,476 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 424 selfloop transitions, 187 changer transitions 0/617 dead transitions. [2024-06-03 20:38:40,476 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 430 places, 617 transitions, 10615 flow [2024-06-03 20:38:40,476 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:38:40,476 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:38:40,477 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:38:40,477 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-03 20:38:40,477 INFO L175 Difference]: Start difference. First operand has 423 places, 580 transitions, 8993 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:38:40,477 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 430 places, 617 transitions, 10615 flow [2024-06-03 20:38:43,272 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 426 places, 617 transitions, 10239 flow, removed 12 selfloop flow, removed 4 redundant places. [2024-06-03 20:38:43,279 INFO L231 Difference]: Finished difference. Result has 428 places, 584 transitions, 9117 flow [2024-06-03 20:38:43,279 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} [2024-06-03 20:38:43,279 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 386 predicate places. [2024-06-03 20:38:43,279 INFO L495 AbstractCegarLoop]: Abstraction has has 428 places, 584 transitions, 9117 flow [2024-06-03 20:38:43,280 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) [2024-06-03 20:38:43,280 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:43,280 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:43,280 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable146 [2024-06-03 20:38:43,280 INFO L420 AbstractCegarLoop]: === Iteration 148 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:38:43,280 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:43,280 INFO L85 PathProgramCache]: Analyzing trace with hash 497063536, now seen corresponding path program 4 times [2024-06-03 20:38:43,280 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:43,281 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1040258569] [2024-06-03 20:38:43,281 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:43,281 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:43,287 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:43,589 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:43,590 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:43,590 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1040258569] [2024-06-03 20:38:43,590 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1040258569] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:43,590 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:43,590 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:38:43,590 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1877660140] [2024-06-03 20:38:43,590 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:43,590 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:38:43,591 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:43,591 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:38:43,591 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:38:43,638 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:43,639 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) [2024-06-03 20:38:43,639 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:43,639 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:43,639 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:44,682 INFO L124 PetriNetUnfolderBase]: 3102/5184 cut-off events. [2024-06-03 20:38:44,682 INFO L125 PetriNetUnfolderBase]: For 650896/650896 co-relation queries the response was YES. [2024-06-03 20:38:44,879 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. [2024-06-03 20:38:44,897 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 424 selfloop transitions, 184 changer transitions 0/614 dead transitions. [2024-06-03 20:38:44,897 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 435 places, 614 transitions, 10459 flow [2024-06-03 20:38:44,898 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:38:44,898 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:38:44,898 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-03 20:38:44,898 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-03 20:38:44,898 INFO L175 Difference]: Start difference. First operand has 428 places, 584 transitions, 9117 flow. Second operand 8 states and 186 transitions. [2024-06-03 20:38:44,898 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 435 places, 614 transitions, 10459 flow [2024-06-03 20:38:49,020 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 430 places, 614 transitions, 10017 flow, removed 39 selfloop flow, removed 5 redundant places. [2024-06-03 20:38:49,027 INFO L231 Difference]: Finished difference. Result has 431 places, 586 transitions, 9108 flow [2024-06-03 20:38:49,027 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} [2024-06-03 20:38:49,028 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 389 predicate places. [2024-06-03 20:38:49,028 INFO L495 AbstractCegarLoop]: Abstraction has has 431 places, 586 transitions, 9108 flow [2024-06-03 20:38:49,028 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) [2024-06-03 20:38:49,028 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:49,028 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:49,028 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable147 [2024-06-03 20:38:49,028 INFO L420 AbstractCegarLoop]: === Iteration 149 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:38:49,029 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:49,029 INFO L85 PathProgramCache]: Analyzing trace with hash 1693173360, now seen corresponding path program 5 times [2024-06-03 20:38:49,029 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:49,029 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2049154131] [2024-06-03 20:38:49,029 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:49,029 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:49,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:49,364 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:49,364 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:49,365 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2049154131] [2024-06-03 20:38:49,365 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2049154131] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:49,365 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:49,365 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:38:49,365 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081988046] [2024-06-03 20:38:49,365 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:49,365 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:38:49,365 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:49,366 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:38:49,366 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:38:49,412 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:49,412 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) [2024-06-03 20:38:49,412 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:49,412 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:49,412 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:50,445 INFO L124 PetriNetUnfolderBase]: 3110/5196 cut-off events. [2024-06-03 20:38:50,446 INFO L125 PetriNetUnfolderBase]: For 661013/661013 co-relation queries the response was YES. [2024-06-03 20:38:50,505 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. [2024-06-03 20:38:50,525 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 423 selfloop transitions, 184 changer transitions 0/613 dead transitions. [2024-06-03 20:38:50,525 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 438 places, 613 transitions, 10422 flow [2024-06-03 20:38:50,525 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:38:50,526 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:38:50,526 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-03 20:38:50,526 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:38:50,526 INFO L175 Difference]: Start difference. First operand has 431 places, 586 transitions, 9108 flow. Second operand 8 states and 184 transitions. [2024-06-03 20:38:50,526 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 438 places, 613 transitions, 10422 flow [2024-06-03 20:38:53,411 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 432 places, 613 transitions, 10037 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 20:38:53,418 INFO L231 Difference]: Finished difference. Result has 433 places, 588 transitions, 9138 flow [2024-06-03 20:38:53,418 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} [2024-06-03 20:38:53,418 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 391 predicate places. [2024-06-03 20:38:53,418 INFO L495 AbstractCegarLoop]: Abstraction has has 433 places, 588 transitions, 9138 flow [2024-06-03 20:38:53,418 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) [2024-06-03 20:38:53,419 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:53,419 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:53,419 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable148 [2024-06-03 20:38:53,419 INFO L420 AbstractCegarLoop]: === Iteration 150 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:38:53,419 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:53,419 INFO L85 PathProgramCache]: Analyzing trace with hash 1690316400, now seen corresponding path program 6 times [2024-06-03 20:38:53,419 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:53,419 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [668015790] [2024-06-03 20:38:53,420 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:53,420 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:53,426 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:53,718 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:53,719 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:53,719 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [668015790] [2024-06-03 20:38:53,719 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [668015790] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:53,719 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:53,719 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:38:53,719 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [404877735] [2024-06-03 20:38:53,719 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:53,723 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:38:53,723 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:53,723 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:38:53,723 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:38:53,772 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:53,773 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) [2024-06-03 20:38:53,773 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:53,773 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:53,773 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:38:54,866 INFO L124 PetriNetUnfolderBase]: 3177/5295 cut-off events. [2024-06-03 20:38:54,866 INFO L125 PetriNetUnfolderBase]: For 734738/734738 co-relation queries the response was YES. [2024-06-03 20:38:54,927 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. [2024-06-03 20:38:54,947 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 425 selfloop transitions, 191 changer transitions 0/622 dead transitions. [2024-06-03 20:38:54,947 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 440 places, 622 transitions, 10774 flow [2024-06-03 20:38:54,948 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:38:54,948 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:38:54,948 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 189 transitions. [2024-06-03 20:38:54,948 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5762195121951219 [2024-06-03 20:38:54,948 INFO L175 Difference]: Start difference. First operand has 433 places, 588 transitions, 9138 flow. Second operand 8 states and 189 transitions. [2024-06-03 20:38:54,948 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 440 places, 622 transitions, 10774 flow [2024-06-03 20:38:59,013 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 434 places, 622 transitions, 10385 flow, removed 12 selfloop flow, removed 6 redundant places. [2024-06-03 20:38:59,020 INFO L231 Difference]: Finished difference. Result has 436 places, 592 transitions, 9242 flow [2024-06-03 20:38:59,020 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} [2024-06-03 20:38:59,020 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 394 predicate places. [2024-06-03 20:38:59,020 INFO L495 AbstractCegarLoop]: Abstraction has has 436 places, 592 transitions, 9242 flow [2024-06-03 20:38:59,021 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) [2024-06-03 20:38:59,021 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:38:59,021 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:38:59,021 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable149 [2024-06-03 20:38:59,021 INFO L420 AbstractCegarLoop]: === Iteration 151 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:38:59,021 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:38:59,021 INFO L85 PathProgramCache]: Analyzing trace with hash 1110622165, now seen corresponding path program 1 times [2024-06-03 20:38:59,021 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:38:59,021 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2065391920] [2024-06-03 20:38:59,022 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:38:59,022 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:38:59,028 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:38:59,324 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:38:59,324 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:38:59,324 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2065391920] [2024-06-03 20:38:59,324 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2065391920] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:38:59,324 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:38:59,324 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:38:59,324 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [824920801] [2024-06-03 20:38:59,325 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:38:59,325 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:38:59,325 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:38:59,325 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:38:59,325 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=28, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:38:59,358 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:38:59,358 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) [2024-06-03 20:38:59,358 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:38:59,358 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:38:59,358 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:39:00,480 INFO L124 PetriNetUnfolderBase]: 3182/5332 cut-off events. [2024-06-03 20:39:00,480 INFO L125 PetriNetUnfolderBase]: For 743540/743551 co-relation queries the response was YES. [2024-06-03 20:39:00,545 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. [2024-06-03 20:39:00,565 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 295 selfloop transitions, 320 changer transitions 0/621 dead transitions. [2024-06-03 20:39:00,565 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 443 places, 621 transitions, 11044 flow [2024-06-03 20:39:00,566 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:39:00,566 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:39:00,566 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 186 transitions. [2024-06-03 20:39:00,566 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5670731707317073 [2024-06-03 20:39:00,567 INFO L175 Difference]: Start difference. First operand has 436 places, 592 transitions, 9242 flow. Second operand 8 states and 186 transitions. [2024-06-03 20:39:00,567 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 443 places, 621 transitions, 11044 flow [2024-06-03 20:39:05,181 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 438 places, 621 transitions, 10657 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:39:05,188 INFO L231 Difference]: Finished difference. Result has 439 places, 595 transitions, 9565 flow [2024-06-03 20:39:05,188 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} [2024-06-03 20:39:05,189 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 397 predicate places. [2024-06-03 20:39:05,189 INFO L495 AbstractCegarLoop]: Abstraction has has 439 places, 595 transitions, 9565 flow [2024-06-03 20:39:05,189 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) [2024-06-03 20:39:05,189 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:39:05,189 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:39:05,189 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable150 [2024-06-03 20:39:05,189 INFO L420 AbstractCegarLoop]: === Iteration 152 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:39:05,190 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:39:05,190 INFO L85 PathProgramCache]: Analyzing trace with hash -567210987, now seen corresponding path program 2 times [2024-06-03 20:39:05,190 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:39:05,192 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2073882500] [2024-06-03 20:39:05,193 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:39:05,193 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:39:05,201 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:39:05,511 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:39:05,511 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:39:05,511 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2073882500] [2024-06-03 20:39:05,511 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2073882500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:39:05,511 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:39:05,511 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:39:05,511 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [240997856] [2024-06-03 20:39:05,512 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:39:05,512 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:39:05,512 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:39:05,512 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:39:05,512 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:39:05,565 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:39:05,565 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) [2024-06-03 20:39:05,565 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:39:05,565 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:39:05,565 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:39:06,718 INFO L124 PetriNetUnfolderBase]: 3187/5311 cut-off events. [2024-06-03 20:39:06,719 INFO L125 PetriNetUnfolderBase]: For 755408/755408 co-relation queries the response was YES. [2024-06-03 20:39:06,802 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. [2024-06-03 20:39:06,824 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 266 selfloop transitions, 356 changer transitions 0/628 dead transitions. [2024-06-03 20:39:06,824 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 447 places, 628 transitions, 11401 flow [2024-06-03 20:39:06,824 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:39:06,824 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:39:06,825 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 209 transitions. [2024-06-03 20:39:06,825 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5663956639566395 [2024-06-03 20:39:06,825 INFO L175 Difference]: Start difference. First operand has 439 places, 595 transitions, 9565 flow. Second operand 9 states and 209 transitions. [2024-06-03 20:39:06,825 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 447 places, 628 transitions, 11401 flow [2024-06-03 20:39:11,617 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 440 places, 628 transitions, 10376 flow, removed 62 selfloop flow, removed 7 redundant places. [2024-06-03 20:39:11,624 INFO L231 Difference]: Finished difference. Result has 441 places, 598 transitions, 9328 flow [2024-06-03 20:39:11,624 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} [2024-06-03 20:39:11,624 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 399 predicate places. [2024-06-03 20:39:11,624 INFO L495 AbstractCegarLoop]: Abstraction has has 441 places, 598 transitions, 9328 flow [2024-06-03 20:39:11,624 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) [2024-06-03 20:39:11,624 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:39:11,625 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:39:11,625 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable151 [2024-06-03 20:39:11,625 INFO L420 AbstractCegarLoop]: === Iteration 153 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:39:11,625 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:39:11,625 INFO L85 PathProgramCache]: Analyzing trace with hash -709594171, now seen corresponding path program 3 times [2024-06-03 20:39:11,625 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:39:11,625 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [990627555] [2024-06-03 20:39:11,625 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:39:11,626 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:39:11,632 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:39:11,931 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:39:11,931 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:39:11,931 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [990627555] [2024-06-03 20:39:11,931 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [990627555] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:39:11,931 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:39:11,931 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:39:11,932 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [953139006] [2024-06-03 20:39:11,932 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:39:11,932 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:39:11,932 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:39:11,932 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:39:11,933 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:39:11,993 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:39:11,994 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) [2024-06-03 20:39:11,994 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:39:11,994 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:39:11,994 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:39:13,102 INFO L124 PetriNetUnfolderBase]: 3192/5320 cut-off events. [2024-06-03 20:39:13,102 INFO L125 PetriNetUnfolderBase]: For 764886/764886 co-relation queries the response was YES. [2024-06-03 20:39:13,165 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. [2024-06-03 20:39:13,184 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 266 selfloop transitions, 359 changer transitions 0/631 dead transitions. [2024-06-03 20:39:13,184 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 449 places, 631 transitions, 11148 flow [2024-06-03 20:39:13,185 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:39:13,185 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:39:13,185 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 211 transitions. [2024-06-03 20:39:13,185 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5718157181571816 [2024-06-03 20:39:13,185 INFO L175 Difference]: Start difference. First operand has 441 places, 598 transitions, 9328 flow. Second operand 9 states and 211 transitions. [2024-06-03 20:39:13,185 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 449 places, 631 transitions, 11148 flow [2024-06-03 20:39:16,804 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 443 places, 631 transitions, 10600 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:39:16,811 INFO L231 Difference]: Finished difference. Result has 444 places, 601 transitions, 9548 flow [2024-06-03 20:39:16,812 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} [2024-06-03 20:39:16,812 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 402 predicate places. [2024-06-03 20:39:16,812 INFO L495 AbstractCegarLoop]: Abstraction has has 444 places, 601 transitions, 9548 flow [2024-06-03 20:39:16,812 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) [2024-06-03 20:39:16,812 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:39:16,812 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:39:16,812 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable152 [2024-06-03 20:39:16,812 INFO L420 AbstractCegarLoop]: === Iteration 154 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:39:16,813 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:39:16,813 INFO L85 PathProgramCache]: Analyzing trace with hash 2010267305, now seen corresponding path program 4 times [2024-06-03 20:39:16,813 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:39:16,813 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2130104369] [2024-06-03 20:39:16,813 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:39:16,813 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:39:16,819 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:39:17,111 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:39:17,111 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:39:17,111 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2130104369] [2024-06-03 20:39:17,111 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2130104369] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:39:17,111 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:39:17,111 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:39:17,111 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [854367017] [2024-06-03 20:39:17,112 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:39:17,112 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:39:17,112 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:39:17,112 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:39:17,112 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:39:17,159 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:39:17,160 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) [2024-06-03 20:39:17,160 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:39:17,160 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:39:17,160 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:39:18,236 INFO L124 PetriNetUnfolderBase]: 3197/5328 cut-off events. [2024-06-03 20:39:18,237 INFO L125 PetriNetUnfolderBase]: For 780223/780223 co-relation queries the response was YES. [2024-06-03 20:39:18,300 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. [2024-06-03 20:39:18,320 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 268 selfloop transitions, 357 changer transitions 0/631 dead transitions. [2024-06-03 20:39:18,321 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 452 places, 631 transitions, 11367 flow [2024-06-03 20:39:18,321 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:39:18,321 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:39:18,321 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 208 transitions. [2024-06-03 20:39:18,321 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5636856368563685 [2024-06-03 20:39:18,322 INFO L175 Difference]: Start difference. First operand has 444 places, 601 transitions, 9548 flow. Second operand 9 states and 208 transitions. [2024-06-03 20:39:18,322 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 452 places, 631 transitions, 11367 flow [2024-06-03 20:39:22,327 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 445 places, 631 transitions, 10615 flow, removed 13 selfloop flow, removed 7 redundant places. [2024-06-03 20:39:22,335 INFO L231 Difference]: Finished difference. Result has 446 places, 604 transitions, 9563 flow [2024-06-03 20:39:22,335 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} [2024-06-03 20:39:22,335 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 404 predicate places. [2024-06-03 20:39:22,335 INFO L495 AbstractCegarLoop]: Abstraction has has 446 places, 604 transitions, 9563 flow [2024-06-03 20:39:22,335 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) [2024-06-03 20:39:22,335 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:39:22,336 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:39:22,336 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable153 [2024-06-03 20:39:22,336 INFO L420 AbstractCegarLoop]: === Iteration 155 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:39:22,336 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:39:22,336 INFO L85 PathProgramCache]: Analyzing trace with hash 2010072005, now seen corresponding path program 5 times [2024-06-03 20:39:22,336 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:39:22,336 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1179008092] [2024-06-03 20:39:22,336 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:39:22,337 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:39:22,343 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:39:22,652 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:39:22,652 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:39:22,652 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1179008092] [2024-06-03 20:39:22,652 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1179008092] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:39:22,652 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:39:22,653 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:39:22,653 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [563414505] [2024-06-03 20:39:22,653 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:39:22,653 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:39:22,653 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:39:22,653 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:39:22,653 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:39:22,694 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:39:22,694 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) [2024-06-03 20:39:22,694 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:39:22,694 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:39:22,694 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:39:23,856 INFO L124 PetriNetUnfolderBase]: 3218/5367 cut-off events. [2024-06-03 20:39:23,856 INFO L125 PetriNetUnfolderBase]: For 806482/806482 co-relation queries the response was YES. [2024-06-03 20:39:23,919 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. [2024-06-03 20:39:23,939 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 271 selfloop transitions, 366 changer transitions 0/643 dead transitions. [2024-06-03 20:39:23,940 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 455 places, 643 transitions, 11976 flow [2024-06-03 20:39:23,940 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:39:23,940 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:39:23,941 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-03 20:39:23,941 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585365853658537 [2024-06-03 20:39:23,941 INFO L175 Difference]: Start difference. First operand has 446 places, 604 transitions, 9563 flow. Second operand 10 states and 229 transitions. [2024-06-03 20:39:23,941 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 455 places, 643 transitions, 11976 flow [2024-06-03 20:39:29,084 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 449 places, 643 transitions, 11426 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:39:29,091 INFO L231 Difference]: Finished difference. Result has 450 places, 613 transitions, 9898 flow [2024-06-03 20:39:29,092 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} [2024-06-03 20:39:29,092 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 408 predicate places. [2024-06-03 20:39:29,092 INFO L495 AbstractCegarLoop]: Abstraction has has 450 places, 613 transitions, 9898 flow [2024-06-03 20:39:29,092 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) [2024-06-03 20:39:29,092 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:39:29,092 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:39:29,093 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable154 [2024-06-03 20:39:29,093 INFO L420 AbstractCegarLoop]: === Iteration 156 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:39:29,093 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:39:29,093 INFO L85 PathProgramCache]: Analyzing trace with hash 1700535705, now seen corresponding path program 6 times [2024-06-03 20:39:29,093 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:39:29,093 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [798946676] [2024-06-03 20:39:29,093 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:39:29,093 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:39:29,100 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:39:29,397 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:39:29,397 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:39:29,397 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [798946676] [2024-06-03 20:39:29,397 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [798946676] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:39:29,397 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:39:29,397 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:39:29,397 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [159795065] [2024-06-03 20:39:29,398 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:39:29,398 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:39:29,398 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:39:29,398 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:39:29,398 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:39:29,466 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:39:29,466 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) [2024-06-03 20:39:29,466 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:39:29,466 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:39:29,466 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:39:30,617 INFO L124 PetriNetUnfolderBase]: 3223/5372 cut-off events. [2024-06-03 20:39:30,617 INFO L125 PetriNetUnfolderBase]: For 822884/822884 co-relation queries the response was YES. [2024-06-03 20:39:30,684 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. [2024-06-03 20:39:30,704 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 267 selfloop transitions, 372 changer transitions 0/645 dead transitions. [2024-06-03 20:39:30,704 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 459 places, 645 transitions, 11998 flow [2024-06-03 20:39:30,705 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:39:30,705 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:39:30,705 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-03 20:39:30,705 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-03 20:39:30,706 INFO L175 Difference]: Start difference. First operand has 450 places, 613 transitions, 9898 flow. Second operand 10 states and 226 transitions. [2024-06-03 20:39:30,706 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 459 places, 645 transitions, 11998 flow [2024-06-03 20:39:35,150 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 645 transitions, 11184 flow, removed 44 selfloop flow, removed 6 redundant places. [2024-06-03 20:39:35,157 INFO L231 Difference]: Finished difference. Result has 454 places, 616 transitions, 9890 flow [2024-06-03 20:39:35,157 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} [2024-06-03 20:39:35,158 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 412 predicate places. [2024-06-03 20:39:35,158 INFO L495 AbstractCegarLoop]: Abstraction has has 454 places, 616 transitions, 9890 flow [2024-06-03 20:39:35,158 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) [2024-06-03 20:39:35,158 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:39:35,158 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:39:35,158 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable155 [2024-06-03 20:39:35,159 INFO L420 AbstractCegarLoop]: === Iteration 157 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:39:35,159 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:39:35,159 INFO L85 PathProgramCache]: Analyzing trace with hash -385842670, now seen corresponding path program 7 times [2024-06-03 20:39:35,159 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:39:35,159 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1605817076] [2024-06-03 20:39:35,159 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:39:35,159 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:39:35,165 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:39:35,460 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:39:35,461 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:39:35,461 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1605817076] [2024-06-03 20:39:35,461 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1605817076] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:39:35,461 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:39:35,461 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:39:35,461 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [872262606] [2024-06-03 20:39:35,461 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:39:35,461 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:39:35,461 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:39:35,462 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:39:35,462 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:39:35,513 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:39:35,513 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) [2024-06-03 20:39:35,513 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:39:35,514 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:39:35,514 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:39:36,684 INFO L124 PetriNetUnfolderBase]: 3257/5437 cut-off events. [2024-06-03 20:39:36,684 INFO L125 PetriNetUnfolderBase]: For 870047/870047 co-relation queries the response was YES. [2024-06-03 20:39:36,750 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. [2024-06-03 20:39:36,771 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 559 selfloop transitions, 87 changer transitions 0/652 dead transitions. [2024-06-03 20:39:36,771 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 461 places, 652 transitions, 11656 flow [2024-06-03 20:39:36,772 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:39:36,772 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:39:36,772 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 185 transitions. [2024-06-03 20:39:36,772 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5640243902439024 [2024-06-03 20:39:36,772 INFO L175 Difference]: Start difference. First operand has 454 places, 616 transitions, 9890 flow. Second operand 8 states and 185 transitions. [2024-06-03 20:39:36,772 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 461 places, 652 transitions, 11656 flow [2024-06-03 20:39:40,708 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 453 places, 652 transitions, 10896 flow, removed 4 selfloop flow, removed 8 redundant places. [2024-06-03 20:39:40,715 INFO L231 Difference]: Finished difference. Result has 455 places, 622 transitions, 9498 flow [2024-06-03 20:39:40,715 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} [2024-06-03 20:39:40,715 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 413 predicate places. [2024-06-03 20:39:40,715 INFO L495 AbstractCegarLoop]: Abstraction has has 455 places, 622 transitions, 9498 flow [2024-06-03 20:39:40,716 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) [2024-06-03 20:39:40,716 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:39:40,716 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:39:40,716 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable156 [2024-06-03 20:39:40,716 INFO L420 AbstractCegarLoop]: === Iteration 158 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:39:40,716 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:39:40,716 INFO L85 PathProgramCache]: Analyzing trace with hash -377271790, now seen corresponding path program 8 times [2024-06-03 20:39:40,716 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:39:40,717 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [81761564] [2024-06-03 20:39:40,717 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:39:40,717 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:39:40,723 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:39:41,041 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:39:41,041 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:39:41,041 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [81761564] [2024-06-03 20:39:41,041 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [81761564] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:39:41,041 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:39:41,042 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:39:41,042 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [324556441] [2024-06-03 20:39:41,042 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:39:41,042 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:39:41,042 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:39:41,042 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:39:41,042 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:39:41,093 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:39:41,093 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) [2024-06-03 20:39:41,093 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:39:41,093 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:39:41,093 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:39:42,306 INFO L124 PetriNetUnfolderBase]: 3252/5435 cut-off events. [2024-06-03 20:39:42,306 INFO L125 PetriNetUnfolderBase]: For 867990/867990 co-relation queries the response was YES. [2024-06-03 20:39:42,370 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. [2024-06-03 20:39:42,391 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 559 selfloop transitions, 82 changer transitions 0/647 dead transitions. [2024-06-03 20:39:42,391 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 462 places, 647 transitions, 10842 flow [2024-06-03 20:39:42,392 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:39:42,392 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:39:42,392 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 180 transitions. [2024-06-03 20:39:42,392 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 20:39:42,392 INFO L175 Difference]: Start difference. First operand has 455 places, 622 transitions, 9498 flow. Second operand 8 states and 180 transitions. [2024-06-03 20:39:42,392 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 462 places, 647 transitions, 10842 flow [2024-06-03 20:39:47,948 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 457 places, 647 transitions, 10592 flow, removed 45 selfloop flow, removed 5 redundant places. [2024-06-03 20:39:47,955 INFO L231 Difference]: Finished difference. Result has 458 places, 622 transitions, 9417 flow [2024-06-03 20:39:47,956 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} [2024-06-03 20:39:47,956 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 416 predicate places. [2024-06-03 20:39:47,956 INFO L495 AbstractCegarLoop]: Abstraction has has 458 places, 622 transitions, 9417 flow [2024-06-03 20:39:47,956 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) [2024-06-03 20:39:47,956 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:39:47,956 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:39:47,956 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable157 [2024-06-03 20:39:47,957 INFO L420 AbstractCegarLoop]: === Iteration 159 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:39:47,957 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:39:47,957 INFO L85 PathProgramCache]: Analyzing trace with hash 578754696, now seen corresponding path program 9 times [2024-06-03 20:39:47,957 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:39:47,957 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1328469103] [2024-06-03 20:39:47,957 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:39:47,957 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:39:47,965 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:39:48,280 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:39:48,280 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:39:48,280 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1328469103] [2024-06-03 20:39:48,281 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1328469103] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:39:48,281 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:39:48,281 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:39:48,281 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2120116035] [2024-06-03 20:39:48,281 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:39:48,281 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:39:48,281 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:39:48,281 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:39:48,282 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:39:48,328 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:39:48,329 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) [2024-06-03 20:39:48,329 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:39:48,329 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:39:48,329 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:39:49,596 INFO L124 PetriNetUnfolderBase]: 3260/5447 cut-off events. [2024-06-03 20:39:49,596 INFO L125 PetriNetUnfolderBase]: For 880414/880414 co-relation queries the response was YES. [2024-06-03 20:39:49,666 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. [2024-06-03 20:39:49,689 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 562 selfloop transitions, 83 changer transitions 0/651 dead transitions. [2024-06-03 20:39:49,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 467 places, 651 transitions, 10811 flow [2024-06-03 20:39:49,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:39:49,690 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:39:49,690 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 214 transitions. [2024-06-03 20:39:49,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-03 20:39:49,690 INFO L175 Difference]: Start difference. First operand has 458 places, 622 transitions, 9417 flow. Second operand 10 states and 214 transitions. [2024-06-03 20:39:49,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 467 places, 651 transitions, 10811 flow [2024-06-03 20:39:54,813 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 651 transitions, 10632 flow, removed 9 selfloop flow, removed 6 redundant places. [2024-06-03 20:39:54,820 INFO L231 Difference]: Finished difference. Result has 462 places, 624 transitions, 9451 flow [2024-06-03 20:39:54,820 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} [2024-06-03 20:39:54,820 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-03 20:39:54,821 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 624 transitions, 9451 flow [2024-06-03 20:39:54,821 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) [2024-06-03 20:39:54,821 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:39:54,821 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] [2024-06-03 20:39:54,821 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable158 [2024-06-03 20:39:54,821 INFO L420 AbstractCegarLoop]: === Iteration 160 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:39:54,821 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:39:54,821 INFO L85 PathProgramCache]: Analyzing trace with hash 1568749994, now seen corresponding path program 10 times [2024-06-03 20:39:54,822 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:39:54,822 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [619403625] [2024-06-03 20:39:54,822 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:39:54,822 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:39:54,828 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:39:55,114 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:39:55,114 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:39:55,114 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [619403625] [2024-06-03 20:39:55,114 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [619403625] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:39:55,114 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:39:55,114 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:39:55,115 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2130932102] [2024-06-03 20:39:55,115 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:39:55,115 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:39:55,115 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:39:55,115 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:39:55,115 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:39:55,149 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:39:55,149 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) [2024-06-03 20:39:55,149 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:39:55,149 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:39:55,149 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:39:56,319 INFO L124 PetriNetUnfolderBase]: 3268/5444 cut-off events. [2024-06-03 20:39:56,319 INFO L125 PetriNetUnfolderBase]: For 895747/895747 co-relation queries the response was YES. [2024-06-03 20:39:56,381 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. [2024-06-03 20:39:56,401 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 459 selfloop transitions, 180 changer transitions 0/645 dead transitions. [2024-06-03 20:39:56,401 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 645 transitions, 10817 flow [2024-06-03 20:39:56,402 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:39:56,402 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:39:56,402 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 179 transitions. [2024-06-03 20:39:56,402 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5457317073170732 [2024-06-03 20:39:56,402 INFO L175 Difference]: Start difference. First operand has 462 places, 624 transitions, 9451 flow. Second operand 8 states and 179 transitions. [2024-06-03 20:39:56,402 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 645 transitions, 10817 flow [2024-06-03 20:40:01,308 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 461 places, 645 transitions, 10630 flow, removed 12 selfloop flow, removed 8 redundant places. [2024-06-03 20:40:01,315 INFO L231 Difference]: Finished difference. Result has 462 places, 626 transitions, 9675 flow [2024-06-03 20:40:01,315 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} [2024-06-03 20:40:01,315 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 420 predicate places. [2024-06-03 20:40:01,315 INFO L495 AbstractCegarLoop]: Abstraction has has 462 places, 626 transitions, 9675 flow [2024-06-03 20:40:01,316 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) [2024-06-03 20:40:01,316 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:01,316 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:01,316 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable159 [2024-06-03 20:40:01,316 INFO L420 AbstractCegarLoop]: === Iteration 161 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:01,316 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:01,316 INFO L85 PathProgramCache]: Analyzing trace with hash -1783833710, now seen corresponding path program 11 times [2024-06-03 20:40:01,316 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:01,317 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1081266729] [2024-06-03 20:40:01,317 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:01,317 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:01,323 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:01,621 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:01,621 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:01,622 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1081266729] [2024-06-03 20:40:01,625 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1081266729] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:01,625 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:01,625 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:01,625 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [363733148] [2024-06-03 20:40:01,625 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:01,625 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:01,626 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:01,626 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:01,626 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:01,682 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:01,682 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) [2024-06-03 20:40:01,682 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:01,682 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:01,682 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:02,902 INFO L124 PetriNetUnfolderBase]: 3348/5562 cut-off events. [2024-06-03 20:40:02,902 INFO L125 PetriNetUnfolderBase]: For 1001833/1001833 co-relation queries the response was YES. [2024-06-03 20:40:02,965 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. [2024-06-03 20:40:02,985 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 461 selfloop transitions, 189 changer transitions 0/656 dead transitions. [2024-06-03 20:40:02,986 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 469 places, 656 transitions, 11439 flow [2024-06-03 20:40:02,986 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:40:02,986 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:40:02,986 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 184 transitions. [2024-06-03 20:40:02,986 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:40:02,986 INFO L175 Difference]: Start difference. First operand has 462 places, 626 transitions, 9675 flow. Second operand 8 states and 184 transitions. [2024-06-03 20:40:02,987 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 469 places, 656 transitions, 11439 flow [2024-06-03 20:40:07,710 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 463 places, 656 transitions, 11054 flow, removed 14 selfloop flow, removed 6 redundant places. [2024-06-03 20:40:07,717 INFO L231 Difference]: Finished difference. Result has 465 places, 632 transitions, 9839 flow [2024-06-03 20:40:07,717 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} [2024-06-03 20:40:07,717 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 423 predicate places. [2024-06-03 20:40:07,717 INFO L495 AbstractCegarLoop]: Abstraction has has 465 places, 632 transitions, 9839 flow [2024-06-03 20:40:07,718 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) [2024-06-03 20:40:07,718 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:07,718 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:07,718 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable160 [2024-06-03 20:40:07,718 INFO L420 AbstractCegarLoop]: === Iteration 162 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:07,718 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:07,718 INFO L85 PathProgramCache]: Analyzing trace with hash -1665685580, now seen corresponding path program 12 times [2024-06-03 20:40:07,718 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:07,718 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1779603225] [2024-06-03 20:40:07,719 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:07,719 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:07,725 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:08,028 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:08,029 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:08,029 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1779603225] [2024-06-03 20:40:08,029 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1779603225] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:08,029 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:08,029 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:08,029 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1709871768] [2024-06-03 20:40:08,029 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:08,030 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:08,030 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:08,030 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:08,030 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:08,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:08,072 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) [2024-06-03 20:40:08,072 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:08,072 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:08,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:09,415 INFO L124 PetriNetUnfolderBase]: 3343/5572 cut-off events. [2024-06-03 20:40:09,416 INFO L125 PetriNetUnfolderBase]: For 1001931/1001931 co-relation queries the response was YES. [2024-06-03 20:40:09,485 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. [2024-06-03 20:40:09,509 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 574 selfloop transitions, 71 changer transitions 0/651 dead transitions. [2024-06-03 20:40:09,509 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 472 places, 651 transitions, 11175 flow [2024-06-03 20:40:09,510 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:40:09,510 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:40:09,510 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 174 transitions. [2024-06-03 20:40:09,510 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5304878048780488 [2024-06-03 20:40:09,511 INFO L175 Difference]: Start difference. First operand has 465 places, 632 transitions, 9839 flow. Second operand 8 states and 174 transitions. [2024-06-03 20:40:09,511 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 472 places, 651 transitions, 11175 flow [2024-06-03 20:40:14,255 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 467 places, 651 transitions, 10780 flow, removed 18 selfloop flow, removed 5 redundant places. [2024-06-03 20:40:14,262 INFO L231 Difference]: Finished difference. Result has 468 places, 632 transitions, 9591 flow [2024-06-03 20:40:14,263 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} [2024-06-03 20:40:14,263 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 426 predicate places. [2024-06-03 20:40:14,263 INFO L495 AbstractCegarLoop]: Abstraction has has 468 places, 632 transitions, 9591 flow [2024-06-03 20:40:14,263 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) [2024-06-03 20:40:14,263 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:14,263 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:14,263 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable161 [2024-06-03 20:40:14,263 INFO L420 AbstractCegarLoop]: === Iteration 163 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:14,264 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:14,264 INFO L85 PathProgramCache]: Analyzing trace with hash -1735589840, now seen corresponding path program 1 times [2024-06-03 20:40:14,264 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:14,264 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1400146349] [2024-06-03 20:40:14,264 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:14,264 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:14,270 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:14,603 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:14,603 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:14,603 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1400146349] [2024-06-03 20:40:14,603 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1400146349] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:14,603 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:14,603 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:14,603 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [2125573874] [2024-06-03 20:40:14,604 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:14,604 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:14,604 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:14,604 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:14,604 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:14,655 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:14,656 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) [2024-06-03 20:40:14,656 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:14,656 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:14,656 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:15,884 INFO L124 PetriNetUnfolderBase]: 3351/5585 cut-off events. [2024-06-03 20:40:15,884 INFO L125 PetriNetUnfolderBase]: For 1015207/1015207 co-relation queries the response was YES. [2024-06-03 20:40:15,951 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. [2024-06-03 20:40:15,971 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 582 selfloop transitions, 68 changer transitions 0/656 dead transitions. [2024-06-03 20:40:15,971 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 475 places, 656 transitions, 10977 flow [2024-06-03 20:40:15,971 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:40:15,971 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:40:15,972 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 176 transitions. [2024-06-03 20:40:15,972 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:40:15,972 INFO L175 Difference]: Start difference. First operand has 468 places, 632 transitions, 9591 flow. Second operand 8 states and 176 transitions. [2024-06-03 20:40:15,972 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 475 places, 656 transitions, 10977 flow [2024-06-03 20:40:21,864 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 470 places, 656 transitions, 10844 flow, removed 11 selfloop flow, removed 5 redundant places. [2024-06-03 20:40:21,872 INFO L231 Difference]: Finished difference. Result has 471 places, 634 transitions, 9635 flow [2024-06-03 20:40:21,872 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} [2024-06-03 20:40:21,872 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 429 predicate places. [2024-06-03 20:40:21,872 INFO L495 AbstractCegarLoop]: Abstraction has has 471 places, 634 transitions, 9635 flow [2024-06-03 20:40:21,872 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) [2024-06-03 20:40:21,873 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:21,873 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:21,873 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable162 [2024-06-03 20:40:21,873 INFO L420 AbstractCegarLoop]: === Iteration 164 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:21,873 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:21,873 INFO L85 PathProgramCache]: Analyzing trace with hash -856570991, now seen corresponding path program 7 times [2024-06-03 20:40:21,873 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:21,873 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [497739431] [2024-06-03 20:40:21,874 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:21,874 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:21,880 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:22,188 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:22,188 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:22,189 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [497739431] [2024-06-03 20:40:22,189 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [497739431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:22,189 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:22,189 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:22,189 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1998226272] [2024-06-03 20:40:22,189 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:22,189 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:22,189 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:22,190 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:22,190 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:22,234 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:22,234 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) [2024-06-03 20:40:22,234 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:22,234 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:22,235 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:23,532 INFO L124 PetriNetUnfolderBase]: 3380/5645 cut-off events. [2024-06-03 20:40:23,532 INFO L125 PetriNetUnfolderBase]: For 1050483/1050500 co-relation queries the response was YES. [2024-06-03 20:40:23,605 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. [2024-06-03 20:40:23,629 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 346 selfloop transitions, 325 changer transitions 0/677 dead transitions. [2024-06-03 20:40:23,629 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 479 places, 677 transitions, 12016 flow [2024-06-03 20:40:23,630 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:40:23,630 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:40:23,630 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 210 transitions. [2024-06-03 20:40:23,630 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5691056910569106 [2024-06-03 20:40:23,630 INFO L175 Difference]: Start difference. First operand has 471 places, 634 transitions, 9635 flow. Second operand 9 states and 210 transitions. [2024-06-03 20:40:23,630 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 479 places, 677 transitions, 12016 flow [2024-06-03 20:40:31,167 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 473 places, 677 transitions, 11863 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 20:40:31,174 INFO L231 Difference]: Finished difference. Result has 474 places, 646 transitions, 10357 flow [2024-06-03 20:40:31,175 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} [2024-06-03 20:40:31,175 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 432 predicate places. [2024-06-03 20:40:31,175 INFO L495 AbstractCegarLoop]: Abstraction has has 474 places, 646 transitions, 10357 flow [2024-06-03 20:40:31,175 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) [2024-06-03 20:40:31,175 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:31,175 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:31,175 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable163 [2024-06-03 20:40:31,176 INFO L420 AbstractCegarLoop]: === Iteration 165 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:31,176 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:31,176 INFO L85 PathProgramCache]: Analyzing trace with hash -1008483209, now seen corresponding path program 8 times [2024-06-03 20:40:31,176 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:31,176 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1033019244] [2024-06-03 20:40:31,176 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:31,176 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:31,183 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:31,514 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:31,515 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:31,515 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1033019244] [2024-06-03 20:40:31,515 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1033019244] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:31,515 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:31,515 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:40:31,515 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [795194201] [2024-06-03 20:40:31,515 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:31,516 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:40:31,516 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:31,516 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:40:31,516 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:40:31,584 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:31,584 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) [2024-06-03 20:40:31,584 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:31,584 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:31,584 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:32,920 INFO L124 PetriNetUnfolderBase]: 3401/5675 cut-off events. [2024-06-03 20:40:32,920 INFO L125 PetriNetUnfolderBase]: For 1081231/1081237 co-relation queries the response was YES. [2024-06-03 20:40:32,993 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. [2024-06-03 20:40:33,016 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 339 selfloop transitions, 347 changer transitions 0/692 dead transitions. [2024-06-03 20:40:33,017 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 485 places, 692 transitions, 12737 flow [2024-06-03 20:40:33,017 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:40:33,017 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:40:33,017 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 266 transitions. [2024-06-03 20:40:33,018 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.540650406504065 [2024-06-03 20:40:33,018 INFO L175 Difference]: Start difference. First operand has 474 places, 646 transitions, 10357 flow. Second operand 12 states and 266 transitions. [2024-06-03 20:40:33,018 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 485 places, 692 transitions, 12737 flow [2024-06-03 20:40:39,322 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 479 places, 692 transitions, 12038 flow, removed 16 selfloop flow, removed 6 redundant places. [2024-06-03 20:40:39,330 INFO L231 Difference]: Finished difference. Result has 480 places, 655 transitions, 10526 flow [2024-06-03 20:40:39,330 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} [2024-06-03 20:40:39,331 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 438 predicate places. [2024-06-03 20:40:39,331 INFO L495 AbstractCegarLoop]: Abstraction has has 480 places, 655 transitions, 10526 flow [2024-06-03 20:40:39,331 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) [2024-06-03 20:40:39,331 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:39,331 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:39,331 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable164 [2024-06-03 20:40:39,331 INFO L420 AbstractCegarLoop]: === Iteration 166 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:39,332 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:39,332 INFO L85 PathProgramCache]: Analyzing trace with hash -205497535, now seen corresponding path program 9 times [2024-06-03 20:40:39,332 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:39,332 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1900992713] [2024-06-03 20:40:39,332 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:39,332 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:39,340 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:39,629 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:39,629 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:39,630 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1900992713] [2024-06-03 20:40:39,630 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1900992713] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:39,630 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:39,630 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:40:39,630 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [584881312] [2024-06-03 20:40:39,630 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:39,630 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:40:39,630 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:39,631 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:40:39,631 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=33, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:40:39,672 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:39,672 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) [2024-06-03 20:40:39,672 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:39,672 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:39,672 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:41,039 INFO L124 PetriNetUnfolderBase]: 3398/5676 cut-off events. [2024-06-03 20:40:41,039 INFO L125 PetriNetUnfolderBase]: For 1093611/1093628 co-relation queries the response was YES. [2024-06-03 20:40:41,116 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. [2024-06-03 20:40:41,141 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 340 selfloop transitions, 338 changer transitions 0/684 dead transitions. [2024-06-03 20:40:41,141 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 489 places, 684 transitions, 12708 flow [2024-06-03 20:40:41,142 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:40:41,142 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:40:41,142 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 226 transitions. [2024-06-03 20:40:41,142 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.551219512195122 [2024-06-03 20:40:41,142 INFO L175 Difference]: Start difference. First operand has 480 places, 655 transitions, 10526 flow. Second operand 10 states and 226 transitions. [2024-06-03 20:40:41,142 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 489 places, 684 transitions, 12708 flow [2024-06-03 20:40:46,499 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 481 places, 684 transitions, 12065 flow, removed 40 selfloop flow, removed 8 redundant places. [2024-06-03 20:40:46,507 INFO L231 Difference]: Finished difference. Result has 482 places, 655 transitions, 10565 flow [2024-06-03 20:40:46,507 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} [2024-06-03 20:40:46,507 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 440 predicate places. [2024-06-03 20:40:46,508 INFO L495 AbstractCegarLoop]: Abstraction has has 482 places, 655 transitions, 10565 flow [2024-06-03 20:40:46,508 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) [2024-06-03 20:40:46,508 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:46,515 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:46,515 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable165 [2024-06-03 20:40:46,515 INFO L420 AbstractCegarLoop]: === Iteration 167 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:46,515 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:46,515 INFO L85 PathProgramCache]: Analyzing trace with hash -1183982579, now seen corresponding path program 10 times [2024-06-03 20:40:46,515 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:46,516 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1546081431] [2024-06-03 20:40:46,516 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:46,516 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:46,522 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:46,844 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:46,844 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:46,844 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1546081431] [2024-06-03 20:40:46,844 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1546081431] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:46,844 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:46,844 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [8] imperfect sequences [] total 8 [2024-06-03 20:40:46,844 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1494855884] [2024-06-03 20:40:46,844 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:46,845 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 10 states [2024-06-03 20:40:46,845 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:46,845 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 10 interpolants. [2024-06-03 20:40:46,845 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=29, Invalid=61, Unknown=0, NotChecked=0, Total=90 [2024-06-03 20:40:46,920 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:46,921 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) [2024-06-03 20:40:46,921 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:46,921 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:46,921 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:48,252 INFO L124 PetriNetUnfolderBase]: 3395/5655 cut-off events. [2024-06-03 20:40:48,252 INFO L125 PetriNetUnfolderBase]: For 1099166/1099166 co-relation queries the response was YES. [2024-06-03 20:40:48,322 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. [2024-06-03 20:40:48,343 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 346 selfloop transitions, 337 changer transitions 0/689 dead transitions. [2024-06-03 20:40:48,344 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 490 places, 689 transitions, 12777 flow [2024-06-03 20:40:48,344 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:40:48,344 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:40:48,344 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 214 transitions. [2024-06-03 20:40:48,345 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5799457994579946 [2024-06-03 20:40:48,345 INFO L175 Difference]: Start difference. First operand has 482 places, 655 transitions, 10565 flow. Second operand 9 states and 214 transitions. [2024-06-03 20:40:48,345 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 490 places, 689 transitions, 12777 flow [2024-06-03 20:40:54,827 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 689 transitions, 12103 flow, removed 8 selfloop flow, removed 7 redundant places. [2024-06-03 20:40:54,834 INFO L231 Difference]: Finished difference. Result has 484 places, 655 transitions, 10571 flow [2024-06-03 20:40:54,835 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} [2024-06-03 20:40:54,835 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 442 predicate places. [2024-06-03 20:40:54,835 INFO L495 AbstractCegarLoop]: Abstraction has has 484 places, 655 transitions, 10571 flow [2024-06-03 20:40:54,835 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) [2024-06-03 20:40:54,835 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:40:54,835 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:40:54,836 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable166 [2024-06-03 20:40:54,836 INFO L420 AbstractCegarLoop]: === Iteration 168 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:40:54,836 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:40:54,836 INFO L85 PathProgramCache]: Analyzing trace with hash -377266675, now seen corresponding path program 11 times [2024-06-03 20:40:54,836 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:40:54,836 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1516048813] [2024-06-03 20:40:54,836 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:40:54,836 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:40:54,843 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:40:55,149 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:40:55,149 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:40:55,149 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1516048813] [2024-06-03 20:40:55,149 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1516048813] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:40:55,149 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:40:55,149 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:40:55,149 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1081347166] [2024-06-03 20:40:55,150 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:40:55,150 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:40:55,150 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:40:55,150 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:40:55,150 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:40:55,220 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:40:55,220 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) [2024-06-03 20:40:55,220 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:40:55,220 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:40:55,220 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:40:56,510 INFO L124 PetriNetUnfolderBase]: 3408/5677 cut-off events. [2024-06-03 20:40:56,510 INFO L125 PetriNetUnfolderBase]: For 1124034/1124034 co-relation queries the response was YES. [2024-06-03 20:40:56,581 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. [2024-06-03 20:40:56,603 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 487 selfloop transitions, 194 changer transitions 0/687 dead transitions. [2024-06-03 20:40:56,603 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 492 places, 687 transitions, 12327 flow [2024-06-03 20:40:56,604 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:40:56,604 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:40:56,604 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 204 transitions. [2024-06-03 20:40:56,604 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5528455284552846 [2024-06-03 20:40:56,604 INFO L175 Difference]: Start difference. First operand has 484 places, 655 transitions, 10571 flow. Second operand 9 states and 204 transitions. [2024-06-03 20:40:56,605 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 492 places, 687 transitions, 12327 flow [2024-06-03 20:41:03,194 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 483 places, 687 transitions, 11616 flow, removed 0 selfloop flow, removed 9 redundant places. [2024-06-03 20:41:03,209 INFO L231 Difference]: Finished difference. Result has 485 places, 661 transitions, 10348 flow [2024-06-03 20:41:03,210 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} [2024-06-03 20:41:03,210 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 443 predicate places. [2024-06-03 20:41:03,210 INFO L495 AbstractCegarLoop]: Abstraction has has 485 places, 661 transitions, 10348 flow [2024-06-03 20:41:03,211 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) [2024-06-03 20:41:03,211 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:03,211 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:03,211 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable167 [2024-06-03 20:41:03,211 INFO L420 AbstractCegarLoop]: === Iteration 169 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:03,211 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:03,211 INFO L85 PathProgramCache]: Analyzing trace with hash -377261095, now seen corresponding path program 12 times [2024-06-03 20:41:03,211 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:03,212 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [230396030] [2024-06-03 20:41:03,212 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:03,212 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:03,218 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:03,517 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:03,517 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:03,517 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [230396030] [2024-06-03 20:41:03,517 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [230396030] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:03,518 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:03,518 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:41:03,518 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [137915400] [2024-06-03 20:41:03,518 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:03,518 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:41:03,518 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:03,518 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:41:03,518 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:41:03,575 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:03,575 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) [2024-06-03 20:41:03,575 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:03,575 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:03,575 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:04,848 INFO L124 PetriNetUnfolderBase]: 3405/5673 cut-off events. [2024-06-03 20:41:04,848 INFO L125 PetriNetUnfolderBase]: For 1130149/1130149 co-relation queries the response was YES. [2024-06-03 20:41:04,926 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. [2024-06-03 20:41:04,950 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 491 selfloop transitions, 189 changer transitions 0/686 dead transitions. [2024-06-03 20:41:04,950 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 493 places, 686 transitions, 11770 flow [2024-06-03 20:41:04,951 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:41:04,951 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:41:04,951 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 201 transitions. [2024-06-03 20:41:04,951 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5447154471544715 [2024-06-03 20:41:04,951 INFO L175 Difference]: Start difference. First operand has 485 places, 661 transitions, 10348 flow. Second operand 9 states and 201 transitions. [2024-06-03 20:41:04,951 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 493 places, 686 transitions, 11770 flow [2024-06-03 20:41:12,249 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 487 places, 686 transitions, 11374 flow, removed 10 selfloop flow, removed 6 redundant places. [2024-06-03 20:41:12,256 INFO L231 Difference]: Finished difference. Result has 488 places, 661 transitions, 10336 flow [2024-06-03 20:41:12,257 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} [2024-06-03 20:41:12,257 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 446 predicate places. [2024-06-03 20:41:12,257 INFO L495 AbstractCegarLoop]: Abstraction has has 488 places, 661 transitions, 10336 flow [2024-06-03 20:41:12,257 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) [2024-06-03 20:41:12,257 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:12,257 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:12,258 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable168 [2024-06-03 20:41:12,258 INFO L420 AbstractCegarLoop]: === Iteration 170 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:12,258 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:12,258 INFO L85 PathProgramCache]: Analyzing trace with hash 546013879, now seen corresponding path program 13 times [2024-06-03 20:41:12,258 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:12,258 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1703164344] [2024-06-03 20:41:12,258 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:12,258 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:12,264 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:12,569 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:12,569 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:12,569 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1703164344] [2024-06-03 20:41:12,569 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1703164344] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:12,570 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:12,570 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:41:12,570 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1286554246] [2024-06-03 20:41:12,570 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:12,570 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:41:12,570 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:12,571 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:41:12,571 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:41:12,608 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:12,608 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) [2024-06-03 20:41:12,608 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:12,608 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:12,608 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:14,047 INFO L124 PetriNetUnfolderBase]: 3418/5696 cut-off events. [2024-06-03 20:41:14,047 INFO L125 PetriNetUnfolderBase]: For 1155729/1155729 co-relation queries the response was YES. [2024-06-03 20:41:14,126 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. [2024-06-03 20:41:14,151 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 493 selfloop transitions, 198 changer transitions 0/697 dead transitions. [2024-06-03 20:41:14,151 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 500 places, 697 transitions, 12156 flow [2024-06-03 20:41:14,164 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:41:14,164 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:41:14,165 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 270 transitions. [2024-06-03 20:41:14,165 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5065666041275797 [2024-06-03 20:41:14,165 INFO L175 Difference]: Start difference. First operand has 488 places, 661 transitions, 10336 flow. Second operand 13 states and 270 transitions. [2024-06-03 20:41:14,165 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 500 places, 697 transitions, 12156 flow [2024-06-03 20:41:20,640 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 492 places, 697 transitions, 11774 flow, removed 0 selfloop flow, removed 8 redundant places. [2024-06-03 20:41:20,648 INFO L231 Difference]: Finished difference. Result has 494 places, 667 transitions, 10483 flow [2024-06-03 20:41:20,648 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} [2024-06-03 20:41:20,649 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 452 predicate places. [2024-06-03 20:41:20,649 INFO L495 AbstractCegarLoop]: Abstraction has has 494 places, 667 transitions, 10483 flow [2024-06-03 20:41:20,649 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) [2024-06-03 20:41:20,649 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:20,649 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:20,649 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable169 [2024-06-03 20:41:20,649 INFO L420 AbstractCegarLoop]: === Iteration 171 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:20,650 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:20,650 INFO L85 PathProgramCache]: Analyzing trace with hash -90027805, now seen corresponding path program 14 times [2024-06-03 20:41:20,650 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:20,650 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [945695116] [2024-06-03 20:41:20,650 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:20,650 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:20,661 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:20,973 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:20,974 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:20,974 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [945695116] [2024-06-03 20:41:20,974 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [945695116] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:20,974 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:20,974 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:41:20,974 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1421147646] [2024-06-03 20:41:20,975 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:20,975 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:41:20,975 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:20,976 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:41:20,976 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:41:21,041 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:21,042 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) [2024-06-03 20:41:21,042 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:21,042 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:21,042 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:22,425 INFO L124 PetriNetUnfolderBase]: 3423/5705 cut-off events. [2024-06-03 20:41:22,425 INFO L125 PetriNetUnfolderBase]: For 1172989/1172989 co-relation queries the response was YES. [2024-06-03 20:41:22,669 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. [2024-06-03 20:41:22,688 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 495 selfloop transitions, 201 changer transitions 0/702 dead transitions. [2024-06-03 20:41:22,689 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 508 places, 702 transitions, 12275 flow [2024-06-03 20:41:22,689 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 20:41:22,689 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 20:41:22,689 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 304 transitions. [2024-06-03 20:41:22,690 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4943089430894309 [2024-06-03 20:41:22,690 INFO L175 Difference]: Start difference. First operand has 494 places, 667 transitions, 10483 flow. Second operand 15 states and 304 transitions. [2024-06-03 20:41:22,690 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 508 places, 702 transitions, 12275 flow [2024-06-03 20:41:28,222 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 498 places, 702 transitions, 11809 flow, removed 40 selfloop flow, removed 10 redundant places. [2024-06-03 20:41:28,229 INFO L231 Difference]: Finished difference. Result has 499 places, 670 transitions, 10487 flow [2024-06-03 20:41:28,230 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} [2024-06-03 20:41:28,230 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-03 20:41:28,230 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 670 transitions, 10487 flow [2024-06-03 20:41:28,230 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) [2024-06-03 20:41:28,230 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:28,230 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:28,231 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable170 [2024-06-03 20:41:28,231 INFO L420 AbstractCegarLoop]: === Iteration 172 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:28,231 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:28,231 INFO L85 PathProgramCache]: Analyzing trace with hash 539948419, now seen corresponding path program 15 times [2024-06-03 20:41:28,231 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:28,231 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [856006364] [2024-06-03 20:41:28,231 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:28,231 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:28,244 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:28,539 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:28,539 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:28,539 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [856006364] [2024-06-03 20:41:28,539 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [856006364] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:28,539 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:28,539 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:41:28,539 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1043401943] [2024-06-03 20:41:28,540 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:28,540 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:41:28,540 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:28,540 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:41:28,540 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:41:28,593 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:28,593 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) [2024-06-03 20:41:28,593 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:28,593 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:28,593 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:30,040 INFO L124 PetriNetUnfolderBase]: 3444/5741 cut-off events. [2024-06-03 20:41:30,040 INFO L125 PetriNetUnfolderBase]: For 1207943/1207943 co-relation queries the response was YES. [2024-06-03 20:41:30,112 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. [2024-06-03 20:41:30,134 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 486 selfloop transitions, 217 changer transitions 0/709 dead transitions. [2024-06-03 20:41:30,134 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 510 places, 709 transitions, 12670 flow [2024-06-03 20:41:30,134 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:41:30,134 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:41:30,135 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 259 transitions. [2024-06-03 20:41:30,135 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5264227642276422 [2024-06-03 20:41:30,135 INFO L175 Difference]: Start difference. First operand has 499 places, 670 transitions, 10487 flow. Second operand 12 states and 259 transitions. [2024-06-03 20:41:30,135 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 510 places, 709 transitions, 12670 flow [2024-06-03 20:41:36,082 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 497 places, 709 transitions, 12260 flow, removed 4 selfloop flow, removed 13 redundant places. [2024-06-03 20:41:36,090 INFO L231 Difference]: Finished difference. Result has 499 places, 679 transitions, 10730 flow [2024-06-03 20:41:36,090 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} [2024-06-03 20:41:36,091 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 457 predicate places. [2024-06-03 20:41:36,091 INFO L495 AbstractCegarLoop]: Abstraction has has 499 places, 679 transitions, 10730 flow [2024-06-03 20:41:36,091 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) [2024-06-03 20:41:36,091 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:36,091 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:36,091 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable171 [2024-06-03 20:41:36,091 INFO L420 AbstractCegarLoop]: === Iteration 173 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:36,091 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:36,092 INFO L85 PathProgramCache]: Analyzing trace with hash -90379345, now seen corresponding path program 16 times [2024-06-03 20:41:36,092 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:36,092 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [127682500] [2024-06-03 20:41:36,092 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:36,092 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:36,098 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:36,401 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:36,401 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:36,402 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [127682500] [2024-06-03 20:41:36,402 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [127682500] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:36,402 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:36,402 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:41:36,402 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1648590785] [2024-06-03 20:41:36,402 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:36,402 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:41:36,402 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:36,403 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:41:36,403 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:41:36,459 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:36,460 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) [2024-06-03 20:41:36,460 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:36,460 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:36,460 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:38,092 INFO L124 PetriNetUnfolderBase]: 3441/5737 cut-off events. [2024-06-03 20:41:38,093 INFO L125 PetriNetUnfolderBase]: For 1216751/1216751 co-relation queries the response was YES. [2024-06-03 20:41:38,165 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. [2024-06-03 20:41:38,187 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 488 selfloop transitions, 217 changer transitions 0/711 dead transitions. [2024-06-03 20:41:38,187 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 711 transitions, 12748 flow [2024-06-03 20:41:38,188 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:41:38,188 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:41:38,188 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 295 transitions. [2024-06-03 20:41:38,188 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5139372822299652 [2024-06-03 20:41:38,188 INFO L175 Difference]: Start difference. First operand has 499 places, 679 transitions, 10730 flow. Second operand 14 states and 295 transitions. [2024-06-03 20:41:38,188 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 711 transitions, 12748 flow [2024-06-03 20:41:44,149 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 711 transitions, 12432 flow, removed 42 selfloop flow, removed 7 redundant places. [2024-06-03 20:41:44,156 INFO L231 Difference]: Finished difference. Result has 506 places, 679 transitions, 10854 flow [2024-06-03 20:41:44,157 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} [2024-06-03 20:41:44,157 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-03 20:41:44,157 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 679 transitions, 10854 flow [2024-06-03 20:41:44,157 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) [2024-06-03 20:41:44,157 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:44,157 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:44,157 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable172 [2024-06-03 20:41:44,158 INFO L420 AbstractCegarLoop]: === Iteration 174 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:44,158 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:44,158 INFO L85 PathProgramCache]: Analyzing trace with hash -90195205, now seen corresponding path program 17 times [2024-06-03 20:41:44,158 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:44,158 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [951945787] [2024-06-03 20:41:44,158 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:44,158 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:44,164 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:44,484 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:44,484 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:44,484 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [951945787] [2024-06-03 20:41:44,484 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [951945787] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:44,484 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:44,484 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:41:44,485 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [555809883] [2024-06-03 20:41:44,485 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:44,485 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:41:44,485 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:44,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:41:44,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:41:44,547 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:44,548 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) [2024-06-03 20:41:44,548 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:44,548 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:44,548 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:45,904 INFO L124 PetriNetUnfolderBase]: 3438/5733 cut-off events. [2024-06-03 20:41:45,905 INFO L125 PetriNetUnfolderBase]: For 1224680/1224680 co-relation queries the response was YES. [2024-06-03 20:41:45,980 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. [2024-06-03 20:41:46,001 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 483 selfloop transitions, 220 changer transitions 0/709 dead transitions. [2024-06-03 20:41:46,002 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 518 places, 709 transitions, 12600 flow [2024-06-03 20:41:46,002 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:41:46,002 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:41:46,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 274 transitions. [2024-06-03 20:41:46,003 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5140712945590994 [2024-06-03 20:41:46,003 INFO L175 Difference]: Start difference. First operand has 506 places, 679 transitions, 10854 flow. Second operand 13 states and 274 transitions. [2024-06-03 20:41:46,003 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 518 places, 709 transitions, 12600 flow [2024-06-03 20:41:53,151 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 709 transitions, 12120 flow, removed 13 selfloop flow, removed 13 redundant places. [2024-06-03 20:41:53,159 INFO L231 Difference]: Finished difference. Result has 506 places, 679 transitions, 10820 flow [2024-06-03 20:41:53,159 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} [2024-06-03 20:41:53,160 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-03 20:41:53,160 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 679 transitions, 10820 flow [2024-06-03 20:41:53,160 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) [2024-06-03 20:41:53,160 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:41:53,160 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:41:53,160 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable173 [2024-06-03 20:41:53,160 INFO L420 AbstractCegarLoop]: === Iteration 175 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:41:53,160 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:41:53,161 INFO L85 PathProgramCache]: Analyzing trace with hash -90373765, now seen corresponding path program 18 times [2024-06-03 20:41:53,161 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:41:53,161 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1216478837] [2024-06-03 20:41:53,161 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:41:53,161 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:41:53,167 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:41:53,472 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:41:53,473 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:41:53,473 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1216478837] [2024-06-03 20:41:53,473 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1216478837] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:41:53,473 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:41:53,473 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:41:53,473 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1560509116] [2024-06-03 20:41:53,473 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:41:53,473 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:41:53,474 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:41:53,485 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:41:53,485 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:41:53,541 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:41:53,542 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) [2024-06-03 20:41:53,542 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:41:53,542 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:41:53,542 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:41:54,947 INFO L124 PetriNetUnfolderBase]: 3435/5727 cut-off events. [2024-06-03 20:41:54,947 INFO L125 PetriNetUnfolderBase]: For 1232737/1232737 co-relation queries the response was YES. [2024-06-03 20:41:55,025 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. [2024-06-03 20:41:55,048 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 510 selfloop transitions, 190 changer transitions 0/706 dead transitions. [2024-06-03 20:41:55,049 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 516 places, 706 transitions, 12286 flow [2024-06-03 20:41:55,049 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:41:55,049 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:41:55,049 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 238 transitions. [2024-06-03 20:41:55,049 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5277161862527716 [2024-06-03 20:41:55,050 INFO L175 Difference]: Start difference. First operand has 506 places, 679 transitions, 10820 flow. Second operand 11 states and 238 transitions. [2024-06-03 20:41:55,050 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 516 places, 706 transitions, 12286 flow [2024-06-03 20:42:02,721 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 504 places, 706 transitions, 11820 flow, removed 9 selfloop flow, removed 12 redundant places. [2024-06-03 20:42:02,729 INFO L231 Difference]: Finished difference. Result has 505 places, 679 transitions, 10740 flow [2024-06-03 20:42:02,729 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} [2024-06-03 20:42:02,729 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 463 predicate places. [2024-06-03 20:42:02,729 INFO L495 AbstractCegarLoop]: Abstraction has has 505 places, 679 transitions, 10740 flow [2024-06-03 20:42:02,730 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) [2024-06-03 20:42:02,730 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:02,730 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:02,730 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable174 [2024-06-03 20:42:02,730 INFO L420 AbstractCegarLoop]: === Iteration 176 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:02,730 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:02,730 INFO L85 PathProgramCache]: Analyzing trace with hash -1204553108, now seen corresponding path program 2 times [2024-06-03 20:42:02,730 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:02,731 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1756939707] [2024-06-03 20:42:02,731 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:02,731 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:02,737 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:03,062 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:03,062 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:03,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1756939707] [2024-06-03 20:42:03,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1756939707] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:03,063 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:03,063 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:42:03,063 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1675036508] [2024-06-03 20:42:03,063 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:03,063 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:42:03,063 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:03,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:42:03,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=36, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:42:03,103 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:03,103 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) [2024-06-03 20:42:03,103 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:03,103 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:03,103 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:04,451 INFO L124 PetriNetUnfolderBase]: 3443/5746 cut-off events. [2024-06-03 20:42:04,451 INFO L125 PetriNetUnfolderBase]: For 1259355/1259355 co-relation queries the response was YES. [2024-06-03 20:42:04,535 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. [2024-06-03 20:42:04,558 INFO L140 encePairwiseOnDemand]: 32/41 looper letters, 627 selfloop transitions, 68 changer transitions 0/701 dead transitions. [2024-06-03 20:42:04,558 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 513 places, 701 transitions, 12214 flow [2024-06-03 20:42:04,559 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:42:04,559 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:42:04,559 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 191 transitions. [2024-06-03 20:42:04,560 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5176151761517616 [2024-06-03 20:42:04,560 INFO L175 Difference]: Start difference. First operand has 505 places, 679 transitions, 10740 flow. Second operand 9 states and 191 transitions. [2024-06-03 20:42:04,560 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 513 places, 701 transitions, 12214 flow [2024-06-03 20:42:11,567 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 502 places, 701 transitions, 11818 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-03 20:42:11,575 INFO L231 Difference]: Finished difference. Result has 503 places, 681 transitions, 10525 flow [2024-06-03 20:42:11,575 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} [2024-06-03 20:42:11,575 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 461 predicate places. [2024-06-03 20:42:11,575 INFO L495 AbstractCegarLoop]: Abstraction has has 503 places, 681 transitions, 10525 flow [2024-06-03 20:42:11,575 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) [2024-06-03 20:42:11,575 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:11,575 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:11,576 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable175 [2024-06-03 20:42:11,576 INFO L420 AbstractCegarLoop]: === Iteration 177 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:11,576 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:11,576 INFO L85 PathProgramCache]: Analyzing trace with hash -1773614405, now seen corresponding path program 19 times [2024-06-03 20:42:11,576 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:11,576 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [425866062] [2024-06-03 20:42:11,576 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:11,576 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:11,583 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:11,878 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:11,878 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:11,878 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [425866062] [2024-06-03 20:42:11,878 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [425866062] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:11,878 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:11,878 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:11,878 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [142234124] [2024-06-03 20:42:11,879 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:11,879 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:11,879 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:11,879 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:11,879 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=27, Invalid=45, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:11,926 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:11,926 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) [2024-06-03 20:42:11,926 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:11,926 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:11,926 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:13,411 INFO L124 PetriNetUnfolderBase]: 3464/5752 cut-off events. [2024-06-03 20:42:13,411 INFO L125 PetriNetUnfolderBase]: For 1287758/1287758 co-relation queries the response was YES. [2024-06-03 20:42:13,479 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. [2024-06-03 20:42:13,500 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 412 changer transitions 0/713 dead transitions. [2024-06-03 20:42:13,501 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 512 places, 713 transitions, 12962 flow [2024-06-03 20:42:13,501 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:42:13,501 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:42:13,501 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 222 transitions. [2024-06-03 20:42:13,502 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5414634146341464 [2024-06-03 20:42:13,502 INFO L175 Difference]: Start difference. First operand has 503 places, 681 transitions, 10525 flow. Second operand 10 states and 222 transitions. [2024-06-03 20:42:13,502 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 512 places, 713 transitions, 12962 flow [2024-06-03 20:42:22,065 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 505 places, 713 transitions, 12805 flow, removed 12 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:22,073 INFO L231 Difference]: Finished difference. Result has 506 places, 690 transitions, 11345 flow [2024-06-03 20:42:22,074 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} [2024-06-03 20:42:22,074 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 464 predicate places. [2024-06-03 20:42:22,074 INFO L495 AbstractCegarLoop]: Abstraction has has 506 places, 690 transitions, 11345 flow [2024-06-03 20:42:22,074 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) [2024-06-03 20:42:22,074 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:22,074 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:22,075 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable176 [2024-06-03 20:42:22,075 INFO L420 AbstractCegarLoop]: === Iteration 178 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:22,075 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:22,075 INFO L85 PathProgramCache]: Analyzing trace with hash 1568760689, now seen corresponding path program 20 times [2024-06-03 20:42:22,075 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:22,075 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [816631936] [2024-06-03 20:42:22,075 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:22,075 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:22,081 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:22,380 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:22,380 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:22,380 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [816631936] [2024-06-03 20:42:22,380 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [816631936] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:22,380 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:22,381 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:22,381 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1551195982] [2024-06-03 20:42:22,381 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:22,381 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:22,381 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:22,381 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:22,381 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:22,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:22,446 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) [2024-06-03 20:42:22,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:22,446 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:22,446 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:23,857 INFO L124 PetriNetUnfolderBase]: 3461/5745 cut-off events. [2024-06-03 20:42:23,857 INFO L125 PetriNetUnfolderBase]: For 1300533/1300533 co-relation queries the response was YES. [2024-06-03 20:42:23,931 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. [2024-06-03 20:42:23,954 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 295 selfloop transitions, 410 changer transitions 0/711 dead transitions. [2024-06-03 20:42:23,955 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 514 places, 711 transitions, 13357 flow [2024-06-03 20:42:23,955 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:42:23,955 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:42:23,955 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 203 transitions. [2024-06-03 20:42:23,955 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5501355013550135 [2024-06-03 20:42:23,956 INFO L175 Difference]: Start difference. First operand has 506 places, 690 transitions, 11345 flow. Second operand 9 states and 203 transitions. [2024-06-03 20:42:23,956 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 514 places, 711 transitions, 13357 flow [2024-06-03 20:42:31,597 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 508 places, 711 transitions, 12730 flow, removed 34 selfloop flow, removed 6 redundant places. [2024-06-03 20:42:31,605 INFO L231 Difference]: Finished difference. Result has 509 places, 690 transitions, 11544 flow [2024-06-03 20:42:31,605 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} [2024-06-03 20:42:31,606 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 467 predicate places. [2024-06-03 20:42:31,606 INFO L495 AbstractCegarLoop]: Abstraction has has 509 places, 690 transitions, 11544 flow [2024-06-03 20:42:31,606 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) [2024-06-03 20:42:31,606 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:31,606 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] [2024-06-03 20:42:31,606 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable177 [2024-06-03 20:42:31,606 INFO L420 AbstractCegarLoop]: === Iteration 179 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:31,606 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:31,607 INFO L85 PathProgramCache]: Analyzing trace with hash -488635105, now seen corresponding path program 21 times [2024-06-03 20:42:31,607 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:31,607 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1829376169] [2024-06-03 20:42:31,607 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:31,607 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:31,613 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:31,928 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:31,929 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:31,929 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1829376169] [2024-06-03 20:42:31,929 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1829376169] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:31,929 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:31,929 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:31,929 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1075174901] [2024-06-03 20:42:31,929 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:31,930 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:31,930 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:31,930 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:31,930 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=31, Invalid=41, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:31,982 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:31,982 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) [2024-06-03 20:42:31,982 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:31,982 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:31,982 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:33,355 INFO L124 PetriNetUnfolderBase]: 3466/5779 cut-off events. [2024-06-03 20:42:33,355 INFO L125 PetriNetUnfolderBase]: For 1321132/1321132 co-relation queries the response was YES. [2024-06-03 20:42:33,433 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. [2024-06-03 20:42:33,457 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 290 selfloop transitions, 423 changer transitions 0/719 dead transitions. [2024-06-03 20:42:33,457 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 519 places, 719 transitions, 14473 flow [2024-06-03 20:42:33,457 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:42:33,457 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:42:33,457 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 244 transitions. [2024-06-03 20:42:33,458 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.541019955654102 [2024-06-03 20:42:33,458 INFO L175 Difference]: Start difference. First operand has 509 places, 690 transitions, 11544 flow. Second operand 11 states and 244 transitions. [2024-06-03 20:42:33,458 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 519 places, 719 transitions, 14473 flow [2024-06-03 20:42:41,035 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 512 places, 719 transitions, 13643 flow, removed 4 selfloop flow, removed 7 redundant places. [2024-06-03 20:42:41,044 INFO L231 Difference]: Finished difference. Result has 513 places, 693 transitions, 11619 flow [2024-06-03 20:42:41,044 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} [2024-06-03 20:42:41,045 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 471 predicate places. [2024-06-03 20:42:41,045 INFO L495 AbstractCegarLoop]: Abstraction has has 513 places, 693 transitions, 11619 flow [2024-06-03 20:42:41,045 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) [2024-06-03 20:42:41,045 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:41,045 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:41,045 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable178 [2024-06-03 20:42:41,045 INFO L420 AbstractCegarLoop]: === Iteration 180 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:41,045 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:41,045 INFO L85 PathProgramCache]: Analyzing trace with hash -1665328925, now seen corresponding path program 22 times [2024-06-03 20:42:41,046 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:41,046 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1176675408] [2024-06-03 20:42:41,046 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:41,046 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:41,052 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:41,366 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:41,366 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:41,366 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1176675408] [2024-06-03 20:42:41,367 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1176675408] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:41,367 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:41,367 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:41,367 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [8529409] [2024-06-03 20:42:41,367 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:41,367 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:41,367 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:41,367 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:41,368 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:41,430 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:41,430 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) [2024-06-03 20:42:41,430 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:41,430 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:41,430 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:42,842 INFO L124 PetriNetUnfolderBase]: 3487/5815 cut-off events. [2024-06-03 20:42:42,842 INFO L125 PetriNetUnfolderBase]: For 1358686/1358686 co-relation queries the response was YES. [2024-06-03 20:42:42,919 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. [2024-06-03 20:42:42,942 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 557 selfloop transitions, 165 changer transitions 0/728 dead transitions. [2024-06-03 20:42:42,942 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 526 places, 728 transitions, 13869 flow [2024-06-03 20:42:42,943 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:42:42,943 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:42:42,943 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 283 transitions. [2024-06-03 20:42:42,943 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.4930313588850174 [2024-06-03 20:42:42,943 INFO L175 Difference]: Start difference. First operand has 513 places, 693 transitions, 11619 flow. Second operand 14 states and 283 transitions. [2024-06-03 20:42:42,943 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 526 places, 728 transitions, 13869 flow [2024-06-03 20:42:51,527 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 517 places, 728 transitions, 12634 flow, removed 60 selfloop flow, removed 9 redundant places. [2024-06-03 20:42:51,535 INFO L231 Difference]: Finished difference. Result has 520 places, 702 transitions, 10932 flow [2024-06-03 20:42:51,536 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} [2024-06-03 20:42:51,536 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 478 predicate places. [2024-06-03 20:42:51,536 INFO L495 AbstractCegarLoop]: Abstraction has has 520 places, 702 transitions, 10932 flow [2024-06-03 20:42:51,536 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) [2024-06-03 20:42:51,536 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:42:51,536 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:42:51,536 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable179 [2024-06-03 20:42:51,536 INFO L420 AbstractCegarLoop]: === Iteration 181 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:42:51,537 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:42:51,537 INFO L85 PathProgramCache]: Analyzing trace with hash 1684403399, now seen corresponding path program 23 times [2024-06-03 20:42:51,537 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:42:51,537 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [2069416703] [2024-06-03 20:42:51,537 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:42:51,537 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:42:51,543 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:42:51,853 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:42:51,853 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:42:51,854 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [2069416703] [2024-06-03 20:42:51,854 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [2069416703] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:42:51,854 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:42:51,854 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:42:51,854 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1843781446] [2024-06-03 20:42:51,854 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:42:51,854 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:42:51,854 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:42:51,855 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:42:51,855 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=51, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:42:51,950 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:42:51,950 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) [2024-06-03 20:42:51,950 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:42:51,950 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:42:51,950 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:42:53,382 INFO L124 PetriNetUnfolderBase]: 3484/5811 cut-off events. [2024-06-03 20:42:53,383 INFO L125 PetriNetUnfolderBase]: For 1359348/1359348 co-relation queries the response was YES. [2024-06-03 20:42:53,464 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. [2024-06-03 20:42:53,487 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 554 selfloop transitions, 165 changer transitions 0/725 dead transitions. [2024-06-03 20:42:53,487 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 531 places, 725 transitions, 12706 flow [2024-06-03 20:42:53,488 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:42:53,488 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:42:53,488 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 248 transitions. [2024-06-03 20:42:53,488 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5040650406504065 [2024-06-03 20:42:53,488 INFO L175 Difference]: Start difference. First operand has 520 places, 702 transitions, 10932 flow. Second operand 12 states and 248 transitions. [2024-06-03 20:42:53,488 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 531 places, 725 transitions, 12706 flow [2024-06-03 20:43:02,074 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 725 transitions, 12340 flow, removed 24 selfloop flow, removed 10 redundant places. [2024-06-03 20:43:02,082 INFO L231 Difference]: Finished difference. Result has 522 places, 702 transitions, 10902 flow [2024-06-03 20:43:02,083 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} [2024-06-03 20:43:02,083 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 480 predicate places. [2024-06-03 20:43:02,083 INFO L495 AbstractCegarLoop]: Abstraction has has 522 places, 702 transitions, 10902 flow [2024-06-03 20:43:02,083 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) [2024-06-03 20:43:02,083 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:02,083 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:02,084 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable180 [2024-06-03 20:43:02,084 INFO L420 AbstractCegarLoop]: === Iteration 182 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:02,084 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:02,084 INFO L85 PathProgramCache]: Analyzing trace with hash 1684046279, now seen corresponding path program 24 times [2024-06-03 20:43:02,084 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:02,084 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1194038038] [2024-06-03 20:43:02,084 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:02,084 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:02,090 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:02,390 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:02,391 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:02,391 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1194038038] [2024-06-03 20:43:02,391 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1194038038] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:02,391 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:02,391 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:02,391 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [503137658] [2024-06-03 20:43:02,391 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:02,391 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:02,392 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:02,392 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:02,392 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:02,446 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:43:02,446 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) [2024-06-03 20:43:02,446 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:02,447 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:43:02,447 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:03,990 INFO L124 PetriNetUnfolderBase]: 3505/5852 cut-off events. [2024-06-03 20:43:03,990 INFO L125 PetriNetUnfolderBase]: For 1398145/1398145 co-relation queries the response was YES. [2024-06-03 20:43:04,069 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. [2024-06-03 20:43:04,092 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 551 selfloop transitions, 177 changer transitions 0/734 dead transitions. [2024-06-03 20:43:04,093 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 532 places, 734 transitions, 13130 flow [2024-06-03 20:43:04,093 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:43:04,093 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:43:04,093 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 236 transitions. [2024-06-03 20:43:04,094 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5232815964523282 [2024-06-03 20:43:04,094 INFO L175 Difference]: Start difference. First operand has 522 places, 702 transitions, 10902 flow. Second operand 11 states and 236 transitions. [2024-06-03 20:43:04,094 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 532 places, 734 transitions, 13130 flow [2024-06-03 20:43:13,693 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 521 places, 734 transitions, 12800 flow, removed 0 selfloop flow, removed 11 redundant places. [2024-06-03 20:43:13,701 INFO L231 Difference]: Finished difference. Result has 523 places, 711 transitions, 11120 flow [2024-06-03 20:43:13,701 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} [2024-06-03 20:43:13,702 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 481 predicate places. [2024-06-03 20:43:13,702 INFO L495 AbstractCegarLoop]: Abstraction has has 523 places, 711 transitions, 11120 flow [2024-06-03 20:43:13,702 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) [2024-06-03 20:43:13,702 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:13,702 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:13,702 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable181 [2024-06-03 20:43:13,702 INFO L420 AbstractCegarLoop]: === Iteration 183 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:13,702 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:13,702 INFO L85 PathProgramCache]: Analyzing trace with hash 1684230419, now seen corresponding path program 25 times [2024-06-03 20:43:13,703 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:13,703 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [437085473] [2024-06-03 20:43:13,703 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:13,703 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:13,709 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:14,012 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:14,013 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:14,013 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [437085473] [2024-06-03 20:43:14,013 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [437085473] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:14,013 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:14,013 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:14,013 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [655538278] [2024-06-03 20:43:14,013 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:14,014 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:14,014 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:14,014 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:14,014 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:14,072 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:43:14,073 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) [2024-06-03 20:43:14,073 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:14,073 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:43:14,073 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:15,502 INFO L124 PetriNetUnfolderBase]: 3518/5874 cut-off events. [2024-06-03 20:43:15,502 INFO L125 PetriNetUnfolderBase]: For 1428276/1428276 co-relation queries the response was YES. [2024-06-03 20:43:15,582 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. [2024-06-03 20:43:15,606 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 551 selfloop transitions, 185 changer transitions 0/742 dead transitions. [2024-06-03 20:43:15,606 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 742 transitions, 13348 flow [2024-06-03 20:43:15,607 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:43:15,607 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:43:15,607 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 269 transitions. [2024-06-03 20:43:15,607 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5046904315196998 [2024-06-03 20:43:15,607 INFO L175 Difference]: Start difference. First operand has 523 places, 711 transitions, 11120 flow. Second operand 13 states and 269 transitions. [2024-06-03 20:43:15,607 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 742 transitions, 13348 flow [2024-06-03 20:43:25,030 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 742 transitions, 13136 flow, removed 18 selfloop flow, removed 6 redundant places. [2024-06-03 20:43:25,038 INFO L231 Difference]: Finished difference. Result has 530 places, 717 transitions, 11410 flow [2024-06-03 20:43:25,039 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} [2024-06-03 20:43:25,039 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-03 20:43:25,039 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 717 transitions, 11410 flow [2024-06-03 20:43:25,039 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) [2024-06-03 20:43:25,039 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:25,039 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:25,039 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable182 [2024-06-03 20:43:25,039 INFO L420 AbstractCegarLoop]: === Iteration 184 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:25,040 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:25,040 INFO L85 PathProgramCache]: Analyzing trace with hash 1684051859, now seen corresponding path program 26 times [2024-06-03 20:43:25,040 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:25,040 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [467801715] [2024-06-03 20:43:25,040 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:25,040 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:25,047 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:25,369 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:25,369 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:25,369 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [467801715] [2024-06-03 20:43:25,369 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [467801715] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:25,369 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:25,369 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:25,369 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1139344621] [2024-06-03 20:43:25,370 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:25,370 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:25,370 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:25,370 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:25,372 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=20, Invalid=52, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:25,437 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:43:25,437 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) [2024-06-03 20:43:25,437 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:25,437 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:43:25,437 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:27,205 INFO L124 PetriNetUnfolderBase]: 3515/5863 cut-off events. [2024-06-03 20:43:27,205 INFO L125 PetriNetUnfolderBase]: For 1437357/1437357 co-relation queries the response was YES. [2024-06-03 20:43:27,280 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. [2024-06-03 20:43:27,301 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 572 selfloop transitions, 158 changer transitions 0/736 dead transitions. [2024-06-03 20:43:27,301 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 736 transitions, 12916 flow [2024-06-03 20:43:27,301 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:43:27,301 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:43:27,302 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 196 transitions. [2024-06-03 20:43:27,302 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5311653116531165 [2024-06-03 20:43:27,302 INFO L175 Difference]: Start difference. First operand has 530 places, 717 transitions, 11410 flow. Second operand 9 states and 196 transitions. [2024-06-03 20:43:27,302 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 736 transitions, 12916 flow [2024-06-03 20:43:37,266 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 529 places, 736 transitions, 12526 flow, removed 30 selfloop flow, removed 9 redundant places. [2024-06-03 20:43:37,275 INFO L231 Difference]: Finished difference. Result has 530 places, 717 transitions, 11342 flow [2024-06-03 20:43:37,275 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} [2024-06-03 20:43:37,275 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 488 predicate places. [2024-06-03 20:43:37,278 INFO L495 AbstractCegarLoop]: Abstraction has has 530 places, 717 transitions, 11342 flow [2024-06-03 20:43:37,278 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) [2024-06-03 20:43:37,278 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:37,279 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:37,279 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable183 [2024-06-03 20:43:37,279 INFO L420 AbstractCegarLoop]: === Iteration 185 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:37,279 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:37,279 INFO L85 PathProgramCache]: Analyzing trace with hash -895750585, now seen corresponding path program 27 times [2024-06-03 20:43:37,279 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:37,279 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [896866306] [2024-06-03 20:43:37,279 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:37,280 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:37,286 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:37,644 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:37,644 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:37,644 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [896866306] [2024-06-03 20:43:37,644 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [896866306] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:37,645 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:37,645 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:37,645 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [238872194] [2024-06-03 20:43:37,645 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:37,645 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:37,645 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:37,645 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:37,645 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=23, Invalid=49, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:37,712 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:43:37,712 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) [2024-06-03 20:43:37,712 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:37,712 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:43:37,712 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:39,532 INFO L124 PetriNetUnfolderBase]: 3512/5866 cut-off events. [2024-06-03 20:43:39,532 INFO L125 PetriNetUnfolderBase]: For 1445336/1445336 co-relation queries the response was YES. [2024-06-03 20:43:39,608 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. [2024-06-03 20:43:39,744 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 552 selfloop transitions, 183 changer transitions 0/741 dead transitions. [2024-06-03 20:43:39,744 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 741 transitions, 13448 flow [2024-06-03 20:43:39,744 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:43:39,744 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:43:39,744 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 253 transitions. [2024-06-03 20:43:39,744 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5142276422764228 [2024-06-03 20:43:39,745 INFO L175 Difference]: Start difference. First operand has 530 places, 717 transitions, 11342 flow. Second operand 12 states and 253 transitions. [2024-06-03 20:43:39,745 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 741 transitions, 13448 flow [2024-06-03 20:43:50,753 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 741 transitions, 13118 flow, removed 7 selfloop flow, removed 8 redundant places. [2024-06-03 20:43:50,761 INFO L231 Difference]: Finished difference. Result has 534 places, 717 transitions, 11384 flow [2024-06-03 20:43:50,761 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} [2024-06-03 20:43:50,762 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 492 predicate places. [2024-06-03 20:43:50,762 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 717 transitions, 11384 flow [2024-06-03 20:43:50,762 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) [2024-06-03 20:43:50,762 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:43:50,762 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:43:50,762 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable184 [2024-06-03 20:43:50,762 INFO L420 AbstractCegarLoop]: === Iteration 186 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:43:50,762 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:43:50,762 INFO L85 PathProgramCache]: Analyzing trace with hash 510216677, now seen corresponding path program 28 times [2024-06-03 20:43:50,763 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:43:50,763 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [428056721] [2024-06-03 20:43:50,763 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:43:50,763 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:43:50,769 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:43:51,061 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:43:51,061 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:43:51,062 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [428056721] [2024-06-03 20:43:51,062 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [428056721] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:43:51,062 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:43:51,062 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:43:51,062 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [894912715] [2024-06-03 20:43:51,062 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:43:51,062 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:43:51,062 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:43:51,063 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:43:51,063 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=28, Invalid=44, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:43:51,117 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:43:51,117 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) [2024-06-03 20:43:51,117 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:43:51,118 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:43:51,118 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:43:52,857 INFO L124 PetriNetUnfolderBase]: 3525/5870 cut-off events. [2024-06-03 20:43:52,858 INFO L125 PetriNetUnfolderBase]: For 1477281/1477281 co-relation queries the response was YES. [2024-06-03 20:43:52,932 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. [2024-06-03 20:43:52,952 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 288 selfloop transitions, 454 changer transitions 0/748 dead transitions. [2024-06-03 20:43:52,952 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 748 transitions, 14202 flow [2024-06-03 20:43:52,953 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:43:52,953 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:43:52,953 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 240 transitions. [2024-06-03 20:43:52,953 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.532150776053215 [2024-06-03 20:43:52,953 INFO L175 Difference]: Start difference. First operand has 534 places, 717 transitions, 11384 flow. Second operand 11 states and 240 transitions. [2024-06-03 20:43:52,954 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 748 transitions, 14202 flow [2024-06-03 20:44:03,268 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 748 transitions, 13808 flow, removed 4 selfloop flow, removed 11 redundant places. [2024-06-03 20:44:03,276 INFO L231 Difference]: Finished difference. Result has 534 places, 723 transitions, 12012 flow [2024-06-03 20:44:03,277 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} [2024-06-03 20:44:03,277 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 492 predicate places. [2024-06-03 20:44:03,277 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 723 transitions, 12012 flow [2024-06-03 20:44:03,277 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) [2024-06-03 20:44:03,277 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:03,277 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:03,278 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable185 [2024-06-03 20:44:03,278 INFO L420 AbstractCegarLoop]: === Iteration 187 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:03,278 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:03,278 INFO L85 PathProgramCache]: Analyzing trace with hash -1659072815, now seen corresponding path program 29 times [2024-06-03 20:44:03,278 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:03,278 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [26696722] [2024-06-03 20:44:03,278 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:03,278 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:03,284 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:03,592 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:03,593 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:03,593 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [26696722] [2024-06-03 20:44:03,593 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [26696722] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:03,593 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:03,593 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:03,593 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [746673219] [2024-06-03 20:44:03,593 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:03,593 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:03,594 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:03,594 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:03,594 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:03,632 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:44:03,632 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) [2024-06-03 20:44:03,632 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:03,632 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:44:03,632 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:05,397 INFO L124 PetriNetUnfolderBase]: 3522/5881 cut-off events. [2024-06-03 20:44:05,397 INFO L125 PetriNetUnfolderBase]: For 1487613/1487613 co-relation queries the response was YES. [2024-06-03 20:44:05,472 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. [2024-06-03 20:44:05,495 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 584 selfloop transitions, 155 changer transitions 0/745 dead transitions. [2024-06-03 20:44:05,496 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 745 transitions, 13836 flow [2024-06-03 20:44:05,496 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:44:05,496 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:44:05,497 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 231 transitions. [2024-06-03 20:44:05,497 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5121951219512195 [2024-06-03 20:44:05,497 INFO L175 Difference]: Start difference. First operand has 534 places, 723 transitions, 12012 flow. Second operand 11 states and 231 transitions. [2024-06-03 20:44:05,497 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 745 transitions, 13836 flow [2024-06-03 20:44:16,339 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 745 transitions, 12578 flow, removed 14 selfloop flow, removed 10 redundant places. [2024-06-03 20:44:16,348 INFO L231 Difference]: Finished difference. Result has 535 places, 723 transitions, 11070 flow [2024-06-03 20:44:16,348 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} [2024-06-03 20:44:16,348 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-03 20:44:16,348 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 723 transitions, 11070 flow [2024-06-03 20:44:16,349 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) [2024-06-03 20:44:16,349 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:16,349 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:16,349 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable186 [2024-06-03 20:44:16,349 INFO L420 AbstractCegarLoop]: === Iteration 188 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:16,349 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:16,349 INFO L85 PathProgramCache]: Analyzing trace with hash -1437422195, now seen corresponding path program 30 times [2024-06-03 20:44:16,349 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:16,350 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1885723039] [2024-06-03 20:44:16,350 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:16,350 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:16,356 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:16,665 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:16,665 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:16,665 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1885723039] [2024-06-03 20:44:16,665 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1885723039] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:16,665 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:16,665 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:44:16,665 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [699552210] [2024-06-03 20:44:16,666 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:16,666 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:44:16,666 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:16,666 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:44:16,666 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=22, Invalid=50, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:44:16,723 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:44:16,723 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) [2024-06-03 20:44:16,723 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:16,723 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:44:16,723 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:18,521 INFO L124 PetriNetUnfolderBase]: 3519/5877 cut-off events. [2024-06-03 20:44:18,521 INFO L125 PetriNetUnfolderBase]: For 1488717/1488717 co-relation queries the response was YES. [2024-06-03 20:44:18,602 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. [2024-06-03 20:44:18,626 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 584 selfloop transitions, 155 changer transitions 0/745 dead transitions. [2024-06-03 20:44:18,627 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 745 transitions, 12600 flow [2024-06-03 20:44:18,627 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:44:18,627 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:44:18,627 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 246 transitions. [2024-06-03 20:44:18,627 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5 [2024-06-03 20:44:18,628 INFO L175 Difference]: Start difference. First operand has 535 places, 723 transitions, 11070 flow. Second operand 12 states and 246 transitions. [2024-06-03 20:44:18,628 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 745 transitions, 12600 flow [2024-06-03 20:44:29,077 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 536 places, 745 transitions, 12256 flow, removed 13 selfloop flow, removed 10 redundant places. [2024-06-03 20:44:29,085 INFO L231 Difference]: Finished difference. Result has 537 places, 723 transitions, 11042 flow [2024-06-03 20:44:29,085 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} [2024-06-03 20:44:29,085 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 495 predicate places. [2024-06-03 20:44:29,086 INFO L495 AbstractCegarLoop]: Abstraction has has 537 places, 723 transitions, 11042 flow [2024-06-03 20:44:29,086 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) [2024-06-03 20:44:29,086 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:29,086 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:29,086 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable187 [2024-06-03 20:44:29,086 INFO L420 AbstractCegarLoop]: === Iteration 189 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:29,086 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:29,086 INFO L85 PathProgramCache]: Analyzing trace with hash -431696942, now seen corresponding path program 13 times [2024-06-03 20:44:29,087 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:29,087 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1614450117] [2024-06-03 20:44:29,087 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:29,087 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:29,093 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:29,438 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:29,438 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:29,439 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1614450117] [2024-06-03 20:44:29,439 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1614450117] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:29,439 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:29,439 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:44:29,439 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [798021280] [2024-06-03 20:44:29,439 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:29,439 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:44:29,439 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:29,440 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:44:29,440 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:44:29,487 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:44:29,487 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) [2024-06-03 20:44:29,488 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:29,488 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:44:29,488 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:31,187 INFO L124 PetriNetUnfolderBase]: 3496/5844 cut-off events. [2024-06-03 20:44:31,187 INFO L125 PetriNetUnfolderBase]: For 1496579/1496579 co-relation queries the response was YES. [2024-06-03 20:44:31,261 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. [2024-06-03 20:44:31,280 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 566 selfloop transitions, 190 changer transitions 0/762 dead transitions. [2024-06-03 20:44:31,280 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 544 places, 762 transitions, 13002 flow [2024-06-03 20:44:31,281 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:44:31,281 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:44:31,281 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 198 transitions. [2024-06-03 20:44:31,281 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6036585365853658 [2024-06-03 20:44:31,281 INFO L175 Difference]: Start difference. First operand has 537 places, 723 transitions, 11042 flow. Second operand 8 states and 198 transitions. [2024-06-03 20:44:31,281 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 544 places, 762 transitions, 13002 flow [2024-06-03 20:44:40,783 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 762 transitions, 12626 flow, removed 9 selfloop flow, removed 13 redundant places. [2024-06-03 20:44:40,791 INFO L231 Difference]: Finished difference. Result has 532 places, 723 transitions, 11057 flow [2024-06-03 20:44:40,792 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} [2024-06-03 20:44:40,792 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 490 predicate places. [2024-06-03 20:44:40,792 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 723 transitions, 11057 flow [2024-06-03 20:44:40,792 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) [2024-06-03 20:44:40,792 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:40,792 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, 1] [2024-06-03 20:44:40,792 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable188 [2024-06-03 20:44:40,793 INFO L420 AbstractCegarLoop]: === Iteration 190 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:40,793 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:40,793 INFO L85 PathProgramCache]: Analyzing trace with hash 1241292608, now seen corresponding path program 14 times [2024-06-03 20:44:40,793 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:40,793 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [450093935] [2024-06-03 20:44:40,793 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:40,793 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:40,799 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:41,131 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:41,131 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:41,132 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [450093935] [2024-06-03 20:44:41,132 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [450093935] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:41,132 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:41,132 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:44:41,132 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [319894220] [2024-06-03 20:44:41,132 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:41,132 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:44:41,132 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:41,133 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:44:41,133 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:44:41,179 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:44:41,179 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) [2024-06-03 20:44:41,179 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:41,179 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:44:41,179 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:42,893 INFO L124 PetriNetUnfolderBase]: 3473/5809 cut-off events. [2024-06-03 20:44:42,894 INFO L125 PetriNetUnfolderBase]: For 1408143/1408143 co-relation queries the response was YES. [2024-06-03 20:44:42,975 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. [2024-06-03 20:44:43,001 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 581 selfloop transitions, 167 changer transitions 0/754 dead transitions. [2024-06-03 20:44:43,001 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 754 transitions, 12657 flow [2024-06-03 20:44:43,001 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:44:43,001 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:44:43,002 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 191 transitions. [2024-06-03 20:44:43,002 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5823170731707317 [2024-06-03 20:44:43,002 INFO L175 Difference]: Start difference. First operand has 532 places, 723 transitions, 11057 flow. Second operand 8 states and 191 transitions. [2024-06-03 20:44:43,002 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 754 transitions, 12657 flow [2024-06-03 20:44:53,549 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 754 transitions, 12196 flow, removed 19 selfloop flow, removed 9 redundant places. [2024-06-03 20:44:53,557 INFO L231 Difference]: Finished difference. Result has 531 places, 723 transitions, 10942 flow [2024-06-03 20:44:53,557 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} [2024-06-03 20:44:53,558 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-03 20:44:53,558 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 723 transitions, 10942 flow [2024-06-03 20:44:53,558 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) [2024-06-03 20:44:53,558 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:44:53,558 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:44:53,558 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable189 [2024-06-03 20:44:53,558 INFO L420 AbstractCegarLoop]: === Iteration 191 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:44:53,558 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:44:53,559 INFO L85 PathProgramCache]: Analyzing trace with hash -136238732, now seen corresponding path program 15 times [2024-06-03 20:44:53,559 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:44:53,559 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1785268903] [2024-06-03 20:44:53,559 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:44:53,559 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:44:53,565 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:44:53,895 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:44:53,895 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:44:53,895 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1785268903] [2024-06-03 20:44:53,895 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1785268903] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:44:53,895 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:44:53,895 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:44:53,895 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [48726193] [2024-06-03 20:44:53,896 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:44:53,896 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:44:53,896 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:44:53,896 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:44:53,896 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:44:53,947 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:44:53,947 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) [2024-06-03 20:44:53,947 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:44:53,947 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:44:53,948 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:44:55,651 INFO L124 PetriNetUnfolderBase]: 3450/5776 cut-off events. [2024-06-03 20:44:55,652 INFO L125 PetriNetUnfolderBase]: For 1275276/1275276 co-relation queries the response was YES. [2024-06-03 20:44:55,727 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. [2024-06-03 20:44:55,747 INFO L140 encePairwiseOnDemand]: 31/41 looper letters, 578 selfloop transitions, 172 changer transitions 0/756 dead transitions. [2024-06-03 20:44:55,747 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 540 places, 756 transitions, 12550 flow [2024-06-03 20:44:55,748 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 10 states. [2024-06-03 20:44:55,748 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 10 states. [2024-06-03 20:44:55,748 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 10 states to 10 states and 229 transitions. [2024-06-03 20:44:55,748 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5585365853658537 [2024-06-03 20:44:55,748 INFO L175 Difference]: Start difference. First operand has 531 places, 723 transitions, 10942 flow. Second operand 10 states and 229 transitions. [2024-06-03 20:44:55,748 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 540 places, 756 transitions, 12550 flow [2024-06-03 20:45:04,487 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 756 transitions, 12182 flow, removed 11 selfloop flow, removed 9 redundant places. [2024-06-03 20:45:04,495 INFO L231 Difference]: Finished difference. Result has 532 places, 723 transitions, 10933 flow [2024-06-03 20:45:04,495 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} [2024-06-03 20:45:04,496 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 490 predicate places. [2024-06-03 20:45:04,496 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 723 transitions, 10933 flow [2024-06-03 20:45:04,496 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) [2024-06-03 20:45:04,496 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:04,496 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:04,496 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable190 [2024-06-03 20:45:04,496 INFO L420 AbstractCegarLoop]: === Iteration 192 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:04,496 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:04,497 INFO L85 PathProgramCache]: Analyzing trace with hash -1592260634, now seen corresponding path program 16 times [2024-06-03 20:45:04,497 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:04,497 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [135669508] [2024-06-03 20:45:04,497 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:04,497 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:04,503 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:04,842 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:04,842 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:04,842 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [135669508] [2024-06-03 20:45:04,843 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [135669508] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:04,843 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:04,843 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:04,843 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [915595101] [2024-06-03 20:45:04,843 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:04,843 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:04,843 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:04,843 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:04,844 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=16, Invalid=40, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:04,885 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:45:04,885 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) [2024-06-03 20:45:04,885 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:04,885 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:45:04,885 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:06,691 INFO L124 PetriNetUnfolderBase]: 3577/5995 cut-off events. [2024-06-03 20:45:06,691 INFO L125 PetriNetUnfolderBase]: For 1610938/1610944 co-relation queries the response was YES. [2024-06-03 20:45:06,803 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. [2024-06-03 20:45:06,833 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 663 selfloop transitions, 90 changer transitions 1/760 dead transitions. [2024-06-03 20:45:06,833 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 760 transitions, 12622 flow [2024-06-03 20:45:06,834 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:45:06,834 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:45:06,835 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 182 transitions. [2024-06-03 20:45:06,835 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6341463414634146 [2024-06-03 20:45:06,835 INFO L175 Difference]: Start difference. First operand has 532 places, 723 transitions, 10933 flow. Second operand 7 states and 182 transitions. [2024-06-03 20:45:06,835 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 760 transitions, 12622 flow [2024-06-03 20:45:15,509 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 527 places, 760 transitions, 12265 flow, removed 2 selfloop flow, removed 11 redundant places. [2024-06-03 20:45:15,517 INFO L231 Difference]: Finished difference. Result has 528 places, 724 transitions, 10822 flow [2024-06-03 20:45:15,518 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} [2024-06-03 20:45:15,518 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 486 predicate places. [2024-06-03 20:45:15,518 INFO L495 AbstractCegarLoop]: Abstraction has has 528 places, 724 transitions, 10822 flow [2024-06-03 20:45:15,518 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) [2024-06-03 20:45:15,518 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:15,518 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:15,518 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable191 [2024-06-03 20:45:15,519 INFO L420 AbstractCegarLoop]: === Iteration 193 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:15,519 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:15,519 INFO L85 PathProgramCache]: Analyzing trace with hash 284223536, now seen corresponding path program 17 times [2024-06-03 20:45:15,519 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:15,519 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [411788089] [2024-06-03 20:45:15,519 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:15,519 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:15,525 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:15,832 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:15,832 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:15,832 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [411788089] [2024-06-03 20:45:15,832 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [411788089] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:15,832 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:15,832 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:15,832 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1348017789] [2024-06-03 20:45:15,832 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:15,833 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:15,833 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:15,833 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:15,833 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=19, Invalid=37, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:15,877 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:45:15,877 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) [2024-06-03 20:45:15,877 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:15,878 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:45:15,878 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:17,652 INFO L124 PetriNetUnfolderBase]: 3590/6013 cut-off events. [2024-06-03 20:45:17,652 INFO L125 PetriNetUnfolderBase]: For 1203678/1203684 co-relation queries the response was YES. [2024-06-03 20:45:17,731 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. [2024-06-03 20:45:17,755 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 614 selfloop transitions, 142 changer transitions 0/762 dead transitions. [2024-06-03 20:45:17,755 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 535 places, 762 transitions, 12490 flow [2024-06-03 20:45:17,755 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:45:17,755 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:45:17,756 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 201 transitions. [2024-06-03 20:45:17,756 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6128048780487805 [2024-06-03 20:45:17,756 INFO L175 Difference]: Start difference. First operand has 528 places, 724 transitions, 10822 flow. Second operand 8 states and 201 transitions. [2024-06-03 20:45:17,756 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 535 places, 762 transitions, 12490 flow [2024-06-03 20:45:27,303 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 530 places, 762 transitions, 12289 flow, removed 32 selfloop flow, removed 5 redundant places. [2024-06-03 20:45:27,311 INFO L231 Difference]: Finished difference. Result has 531 places, 725 transitions, 10954 flow [2024-06-03 20:45:27,311 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} [2024-06-03 20:45:27,311 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 489 predicate places. [2024-06-03 20:45:27,311 INFO L495 AbstractCegarLoop]: Abstraction has has 531 places, 725 transitions, 10954 flow [2024-06-03 20:45:27,311 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) [2024-06-03 20:45:27,311 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:27,312 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:27,312 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable192 [2024-06-03 20:45:27,312 INFO L420 AbstractCegarLoop]: === Iteration 194 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:27,312 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:27,312 INFO L85 PathProgramCache]: Analyzing trace with hash 399514706, now seen corresponding path program 18 times [2024-06-03 20:45:27,312 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:27,312 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1804839998] [2024-06-03 20:45:27,312 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:27,313 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:27,318 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:27,660 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:27,661 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:27,661 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1804839998] [2024-06-03 20:45:27,661 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1804839998] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:27,661 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:27,661 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:27,661 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1662926696] [2024-06-03 20:45:27,661 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:27,661 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:27,661 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:27,662 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:27,662 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=15, Invalid=41, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:27,736 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:45:27,737 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) [2024-06-03 20:45:27,737 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:27,737 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:45:27,737 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:29,468 INFO L124 PetriNetUnfolderBase]: 3613/6050 cut-off events. [2024-06-03 20:45:29,468 INFO L125 PetriNetUnfolderBase]: For 1199072/1199078 co-relation queries the response was YES. [2024-06-03 20:45:29,547 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. [2024-06-03 20:45:29,568 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 677 selfloop transitions, 77 changer transitions 0/760 dead transitions. [2024-06-03 20:45:29,569 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 538 places, 760 transitions, 12612 flow [2024-06-03 20:45:29,569 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:45:29,569 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:45:29,569 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 195 transitions. [2024-06-03 20:45:29,570 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5945121951219512 [2024-06-03 20:45:29,570 INFO L175 Difference]: Start difference. First operand has 531 places, 725 transitions, 10954 flow. Second operand 8 states and 195 transitions. [2024-06-03 20:45:29,570 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 538 places, 760 transitions, 12612 flow [2024-06-03 20:45:39,316 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 531 places, 760 transitions, 12284 flow, removed 25 selfloop flow, removed 7 redundant places. [2024-06-03 20:45:39,324 INFO L231 Difference]: Finished difference. Result has 532 places, 726 transitions, 10831 flow [2024-06-03 20:45:39,325 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} [2024-06-03 20:45:39,325 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 490 predicate places. [2024-06-03 20:45:39,325 INFO L495 AbstractCegarLoop]: Abstraction has has 532 places, 726 transitions, 10831 flow [2024-06-03 20:45:39,325 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) [2024-06-03 20:45:39,325 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:39,325 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:39,325 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable193 [2024-06-03 20:45:39,326 INFO L420 AbstractCegarLoop]: === Iteration 195 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:39,326 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:39,326 INFO L85 PathProgramCache]: Analyzing trace with hash 492333224, now seen corresponding path program 19 times [2024-06-03 20:45:39,326 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:39,326 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [587897639] [2024-06-03 20:45:39,326 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:39,326 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:39,332 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:39,646 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:39,647 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:39,647 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [587897639] [2024-06-03 20:45:39,647 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [587897639] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:39,647 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:39,647 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:39,647 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [612095626] [2024-06-03 20:45:39,647 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:39,647 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:39,647 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:39,648 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:39,648 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=17, Invalid=39, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:39,700 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:45:39,700 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) [2024-06-03 20:45:39,700 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:39,700 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:45:39,700 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:41,236 INFO L124 PetriNetUnfolderBase]: 3636/6092 cut-off events. [2024-06-03 20:45:41,236 INFO L125 PetriNetUnfolderBase]: For 1174025/1174031 co-relation queries the response was YES. [2024-06-03 20:45:41,323 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. [2024-06-03 20:45:41,534 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 605 selfloop transitions, 159 changer transitions 0/770 dead transitions. [2024-06-03 20:45:41,535 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 539 places, 770 transitions, 12571 flow [2024-06-03 20:45:41,535 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 8 states. [2024-06-03 20:45:41,535 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 8 states. [2024-06-03 20:45:41,535 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 8 states to 8 states and 206 transitions. [2024-06-03 20:45:41,536 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.6280487804878049 [2024-06-03 20:45:41,536 INFO L175 Difference]: Start difference. First operand has 532 places, 726 transitions, 10831 flow. Second operand 8 states and 206 transitions. [2024-06-03 20:45:41,536 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 539 places, 770 transitions, 12571 flow [2024-06-03 20:45:49,946 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 534 places, 770 transitions, 12388 flow, removed 25 selfloop flow, removed 5 redundant places. [2024-06-03 20:45:49,954 INFO L231 Difference]: Finished difference. Result has 535 places, 727 transitions, 11018 flow [2024-06-03 20:45:49,954 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} [2024-06-03 20:45:49,955 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 493 predicate places. [2024-06-03 20:45:49,955 INFO L495 AbstractCegarLoop]: Abstraction has has 535 places, 727 transitions, 11018 flow [2024-06-03 20:45:49,955 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) [2024-06-03 20:45:49,955 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:45:49,955 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:45:49,955 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable194 [2024-06-03 20:45:49,955 INFO L420 AbstractCegarLoop]: === Iteration 196 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:45:49,956 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:45:49,956 INFO L85 PathProgramCache]: Analyzing trace with hash -136054034, now seen corresponding path program 3 times [2024-06-03 20:45:49,956 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:45:49,956 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1272429231] [2024-06-03 20:45:49,956 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:45:49,956 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:45:49,963 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:45:50,310 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:45:50,310 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:45:50,310 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1272429231] [2024-06-03 20:45:50,310 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1272429231] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:45:50,310 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:45:50,311 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [6] imperfect sequences [] total 6 [2024-06-03 20:45:50,311 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1248890785] [2024-06-03 20:45:50,311 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:45:50,311 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 8 states [2024-06-03 20:45:50,311 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:45:50,311 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 8 interpolants. [2024-06-03 20:45:50,311 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=21, Invalid=35, Unknown=0, NotChecked=0, Total=56 [2024-06-03 20:45:50,364 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:45:50,364 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) [2024-06-03 20:45:50,364 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:45:50,364 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:45:50,364 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:45:52,045 INFO L124 PetriNetUnfolderBase]: 3631/6080 cut-off events. [2024-06-03 20:45:52,046 INFO L125 PetriNetUnfolderBase]: For 1082795/1082795 co-relation queries the response was YES. [2024-06-03 20:45:52,122 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. [2024-06-03 20:45:52,143 INFO L140 encePairwiseOnDemand]: 33/41 looper letters, 668 selfloop transitions, 71 changer transitions 0/745 dead transitions. [2024-06-03 20:45:52,143 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 541 places, 745 transitions, 12540 flow [2024-06-03 20:45:52,144 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 7 states. [2024-06-03 20:45:52,144 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 7 states. [2024-06-03 20:45:52,144 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 7 states to 7 states and 157 transitions. [2024-06-03 20:45:52,144 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5470383275261324 [2024-06-03 20:45:52,144 INFO L175 Difference]: Start difference. First operand has 535 places, 727 transitions, 11018 flow. Second operand 7 states and 157 transitions. [2024-06-03 20:45:52,144 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 541 places, 745 transitions, 12540 flow [2024-06-03 20:46:00,216 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 533 places, 745 transitions, 12178 flow, removed 23 selfloop flow, removed 8 redundant places. [2024-06-03 20:46:00,224 INFO L231 Difference]: Finished difference. Result has 534 places, 727 transitions, 10809 flow [2024-06-03 20:46:00,224 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} [2024-06-03 20:46:00,224 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 492 predicate places. [2024-06-03 20:46:00,224 INFO L495 AbstractCegarLoop]: Abstraction has has 534 places, 727 transitions, 10809 flow [2024-06-03 20:46:00,224 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) [2024-06-03 20:46:00,224 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:00,224 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:00,225 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable195 [2024-06-03 20:46:00,225 INFO L420 AbstractCegarLoop]: === Iteration 197 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:00,225 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:00,225 INFO L85 PathProgramCache]: Analyzing trace with hash 1241297723, now seen corresponding path program 31 times [2024-06-03 20:46:00,225 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:00,225 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [415257864] [2024-06-03 20:46:00,225 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:00,225 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:00,232 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:00,576 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:00,577 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:00,577 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [415257864] [2024-06-03 20:46:00,577 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [415257864] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:00,577 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:00,577 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:00,577 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [916859458] [2024-06-03 20:46:00,577 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:00,577 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:00,578 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:00,578 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:00,578 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:00,643 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:46:00,644 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) [2024-06-03 20:46:00,644 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:00,644 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:46:00,644 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:02,340 INFO L124 PetriNetUnfolderBase]: 3628/6069 cut-off events. [2024-06-03 20:46:02,340 INFO L125 PetriNetUnfolderBase]: For 1042912/1042912 co-relation queries the response was YES. [2024-06-03 20:46:02,417 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. [2024-06-03 20:46:02,436 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 357 selfloop transitions, 395 changer transitions 0/758 dead transitions. [2024-06-03 20:46:02,436 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 542 places, 758 transitions, 13277 flow [2024-06-03 20:46:02,436 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:46:02,436 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:46:02,437 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 213 transitions. [2024-06-03 20:46:02,437 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5772357723577236 [2024-06-03 20:46:02,437 INFO L175 Difference]: Start difference. First operand has 534 places, 727 transitions, 10809 flow. Second operand 9 states and 213 transitions. [2024-06-03 20:46:02,437 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 542 places, 758 transitions, 13277 flow [2024-06-03 20:46:11,142 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 537 places, 758 transitions, 13118 flow, removed 13 selfloop flow, removed 5 redundant places. [2024-06-03 20:46:11,150 INFO L231 Difference]: Finished difference. Result has 538 places, 727 transitions, 11462 flow [2024-06-03 20:46:11,150 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} [2024-06-03 20:46:11,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 496 predicate places. [2024-06-03 20:46:11,151 INFO L495 AbstractCegarLoop]: Abstraction has has 538 places, 727 transitions, 11462 flow [2024-06-03 20:46:11,151 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) [2024-06-03 20:46:11,151 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:11,151 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:11,151 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable196 [2024-06-03 20:46:11,151 INFO L420 AbstractCegarLoop]: === Iteration 198 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:11,152 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:11,152 INFO L85 PathProgramCache]: Analyzing trace with hash -423115367, now seen corresponding path program 32 times [2024-06-03 20:46:11,152 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:11,152 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1612562361] [2024-06-03 20:46:11,152 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:11,152 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:11,158 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:11,487 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:11,488 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:11,488 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1612562361] [2024-06-03 20:46:11,488 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1612562361] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:11,488 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:11,488 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:11,488 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [927774962] [2024-06-03 20:46:11,488 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:11,488 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:11,488 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:11,489 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:11,489 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:11,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:46:11,546 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) [2024-06-03 20:46:11,546 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:11,546 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:46:11,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:13,181 INFO L124 PetriNetUnfolderBase]: 3625/6065 cut-off events. [2024-06-03 20:46:13,182 INFO L125 PetriNetUnfolderBase]: For 1022044/1022044 co-relation queries the response was YES. [2024-06-03 20:46:13,259 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. [2024-06-03 20:46:13,477 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 355 selfloop transitions, 396 changer transitions 0/757 dead transitions. [2024-06-03 20:46:13,477 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 546 places, 757 transitions, 13626 flow [2024-06-03 20:46:13,478 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 9 states. [2024-06-03 20:46:13,478 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 9 states. [2024-06-03 20:46:13,478 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 9 states to 9 states and 212 transitions. [2024-06-03 20:46:13,478 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5745257452574526 [2024-06-03 20:46:13,478 INFO L175 Difference]: Start difference. First operand has 538 places, 727 transitions, 11462 flow. Second operand 9 states and 212 transitions. [2024-06-03 20:46:13,478 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 546 places, 757 transitions, 13626 flow [2024-06-03 20:46:22,551 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 540 places, 757 transitions, 12972 flow, removed 13 selfloop flow, removed 6 redundant places. [2024-06-03 20:46:22,559 INFO L231 Difference]: Finished difference. Result has 541 places, 727 transitions, 11614 flow [2024-06-03 20:46:22,560 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} [2024-06-03 20:46:22,560 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 499 predicate places. [2024-06-03 20:46:22,560 INFO L495 AbstractCegarLoop]: Abstraction has has 541 places, 727 transitions, 11614 flow [2024-06-03 20:46:22,560 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) [2024-06-03 20:46:22,560 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:22,560 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:22,560 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable197 [2024-06-03 20:46:22,561 INFO L420 AbstractCegarLoop]: === Iteration 199 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:22,561 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:22,561 INFO L85 PathProgramCache]: Analyzing trace with hash 1528190633, now seen corresponding path program 33 times [2024-06-03 20:46:22,561 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:22,561 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [281799123] [2024-06-03 20:46:22,561 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:22,561 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:22,567 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:22,890 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:22,890 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:22,891 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [281799123] [2024-06-03 20:46:22,891 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [281799123] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:22,891 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:22,891 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:22,891 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1646902886] [2024-06-03 20:46:22,891 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:22,891 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:22,891 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:22,892 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:22,892 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:22,968 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:46:22,969 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) [2024-06-03 20:46:22,969 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:22,969 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:46:22,969 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:24,690 INFO L124 PetriNetUnfolderBase]: 3622/6061 cut-off events. [2024-06-03 20:46:24,691 INFO L125 PetriNetUnfolderBase]: For 1012646/1012646 co-relation queries the response was YES. [2024-06-03 20:46:24,771 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. [2024-06-03 20:46:24,792 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 353 selfloop transitions, 400 changer transitions 0/759 dead transitions. [2024-06-03 20:46:24,792 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 551 places, 759 transitions, 13786 flow [2024-06-03 20:46:24,793 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 11 states. [2024-06-03 20:46:24,793 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 11 states. [2024-06-03 20:46:24,793 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 11 states to 11 states and 253 transitions. [2024-06-03 20:46:24,793 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5609756097560976 [2024-06-03 20:46:24,793 INFO L175 Difference]: Start difference. First operand has 541 places, 727 transitions, 11614 flow. Second operand 11 states and 253 transitions. [2024-06-03 20:46:24,793 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 551 places, 759 transitions, 13786 flow [2024-06-03 20:46:34,190 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 541 places, 759 transitions, 12952 flow, removed 7 selfloop flow, removed 10 redundant places. [2024-06-03 20:46:34,199 INFO L231 Difference]: Finished difference. Result has 542 places, 727 transitions, 11598 flow [2024-06-03 20:46:34,199 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} [2024-06-03 20:46:34,199 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 500 predicate places. [2024-06-03 20:46:34,199 INFO L495 AbstractCegarLoop]: Abstraction has has 542 places, 727 transitions, 11598 flow [2024-06-03 20:46:34,199 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) [2024-06-03 20:46:34,199 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:34,200 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:34,200 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable198 [2024-06-03 20:46:34,200 INFO L420 AbstractCegarLoop]: === Iteration 200 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:34,200 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:34,200 INFO L85 PathProgramCache]: Analyzing trace with hash 1528185053, now seen corresponding path program 34 times [2024-06-03 20:46:34,200 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:34,200 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [716618527] [2024-06-03 20:46:34,200 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:34,201 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:34,207 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:34,535 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:34,535 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:34,535 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [716618527] [2024-06-03 20:46:34,535 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [716618527] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:34,535 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:34,535 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:34,535 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [206473708] [2024-06-03 20:46:34,535 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:34,536 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:34,536 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:34,536 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:34,536 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:34,605 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:46:34,605 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) [2024-06-03 20:46:34,605 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:34,605 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:46:34,605 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:36,242 INFO L124 PetriNetUnfolderBase]: 3619/6064 cut-off events. [2024-06-03 20:46:36,242 INFO L125 PetriNetUnfolderBase]: For 1001510/1001510 co-relation queries the response was YES. [2024-06-03 20:46:36,323 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. [2024-06-03 20:46:36,345 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 359 selfloop transitions, 399 changer transitions 0/764 dead transitions. [2024-06-03 20:46:36,346 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 764 transitions, 14378 flow [2024-06-03 20:46:36,346 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 14 states. [2024-06-03 20:46:36,346 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 14 states. [2024-06-03 20:46:36,346 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 14 states to 14 states and 308 transitions. [2024-06-03 20:46:36,347 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5365853658536586 [2024-06-03 20:46:36,347 INFO L175 Difference]: Start difference. First operand has 542 places, 727 transitions, 11598 flow. Second operand 14 states and 308 transitions. [2024-06-03 20:46:36,347 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 764 transitions, 14378 flow [2024-06-03 20:46:45,732 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 544 places, 764 transitions, 13722 flow, removed 10 selfloop flow, removed 11 redundant places. [2024-06-03 20:46:45,741 INFO L231 Difference]: Finished difference. Result has 545 places, 727 transitions, 11770 flow [2024-06-03 20:46:45,741 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} [2024-06-03 20:46:45,741 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 503 predicate places. [2024-06-03 20:46:45,741 INFO L495 AbstractCegarLoop]: Abstraction has has 545 places, 727 transitions, 11770 flow [2024-06-03 20:46:45,741 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) [2024-06-03 20:46:45,742 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:45,742 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, 1] [2024-06-03 20:46:45,742 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable199 [2024-06-03 20:46:45,742 INFO L420 AbstractCegarLoop]: === Iteration 201 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:45,742 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:45,742 INFO L85 PathProgramCache]: Analyzing trace with hash -136060637, now seen corresponding path program 35 times [2024-06-03 20:46:45,742 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:45,742 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [543069468] [2024-06-03 20:46:45,742 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:45,743 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:45,749 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:46,065 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:46,065 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:46,065 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [543069468] [2024-06-03 20:46:46,065 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [543069468] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:46,065 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:46,065 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:46,066 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1616931266] [2024-06-03 20:46:46,066 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:46,066 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:46,066 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:46,066 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:46,066 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:46,123 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:46:46,123 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) [2024-06-03 20:46:46,123 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:46,123 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:46:46,123 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:47,862 INFO L124 PetriNetUnfolderBase]: 3624/6073 cut-off events. [2024-06-03 20:46:47,862 INFO L125 PetriNetUnfolderBase]: For 990726/990726 co-relation queries the response was YES. [2024-06-03 20:46:47,941 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. [2024-06-03 20:46:47,961 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 357 selfloop transitions, 402 changer transitions 0/765 dead transitions. [2024-06-03 20:46:47,962 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 556 places, 765 transitions, 14603 flow [2024-06-03 20:46:47,962 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 12 states. [2024-06-03 20:46:47,962 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 12 states. [2024-06-03 20:46:47,962 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 12 states to 12 states and 270 transitions. [2024-06-03 20:46:47,963 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5487804878048781 [2024-06-03 20:46:47,963 INFO L175 Difference]: Start difference. First operand has 545 places, 727 transitions, 11770 flow. Second operand 12 states and 270 transitions. [2024-06-03 20:46:47,963 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 556 places, 765 transitions, 14603 flow [2024-06-03 20:46:56,141 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 542 places, 765 transitions, 13488 flow, removed 19 selfloop flow, removed 14 redundant places. [2024-06-03 20:46:56,150 INFO L231 Difference]: Finished difference. Result has 543 places, 730 transitions, 11552 flow [2024-06-03 20:46:56,150 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} [2024-06-03 20:46:56,151 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 501 predicate places. [2024-06-03 20:46:56,151 INFO L495 AbstractCegarLoop]: Abstraction has has 543 places, 730 transitions, 11552 flow [2024-06-03 20:46:56,152 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) [2024-06-03 20:46:56,152 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:46:56,152 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:46:56,152 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable200 [2024-06-03 20:46:56,152 INFO L420 AbstractCegarLoop]: === Iteration 202 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:46:56,153 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:46:56,153 INFO L85 PathProgramCache]: Analyzing trace with hash 1528369193, now seen corresponding path program 36 times [2024-06-03 20:46:56,153 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:46:56,153 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [76336042] [2024-06-03 20:46:56,153 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:46:56,153 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:46:56,159 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:46:56,486 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:46:56,486 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:46:56,486 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [76336042] [2024-06-03 20:46:56,486 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [76336042] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:46:56,486 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:46:56,486 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:46:56,486 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [18214521] [2024-06-03 20:46:56,487 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:46:56,487 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:46:56,487 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:46:56,487 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:46:56,487 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=26, Invalid=46, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:46:56,554 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:46:56,554 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) [2024-06-03 20:46:56,554 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:46:56,554 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:46:56,554 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:46:58,272 INFO L124 PetriNetUnfolderBase]: 3621/6069 cut-off events. [2024-06-03 20:46:58,272 INFO L125 PetriNetUnfolderBase]: For 965161/965161 co-relation queries the response was YES. [2024-06-03 20:46:58,353 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. [2024-06-03 20:46:58,376 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 349 selfloop transitions, 410 changer transitions 0/765 dead transitions. [2024-06-03 20:46:58,376 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 555 places, 765 transitions, 14024 flow [2024-06-03 20:46:58,376 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:46:58,377 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:46:58,377 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 285 transitions. [2024-06-03 20:46:58,377 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5347091932457786 [2024-06-03 20:46:58,377 INFO L175 Difference]: Start difference. First operand has 543 places, 730 transitions, 11552 flow. Second operand 13 states and 285 transitions. [2024-06-03 20:46:58,377 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 555 places, 765 transitions, 14024 flow [2024-06-03 20:47:06,169 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 543 places, 765 transitions, 13184 flow, removed 17 selfloop flow, removed 12 redundant places. [2024-06-03 20:47:06,178 INFO L231 Difference]: Finished difference. Result has 544 places, 730 transitions, 11558 flow [2024-06-03 20:47:06,178 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} [2024-06-03 20:47:06,179 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 502 predicate places. [2024-06-03 20:47:06,179 INFO L495 AbstractCegarLoop]: Abstraction has has 544 places, 730 transitions, 11558 flow [2024-06-03 20:47:06,179 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) [2024-06-03 20:47:06,179 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:06,179 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:06,179 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable201 [2024-06-03 20:47:06,179 INFO L420 AbstractCegarLoop]: === Iteration 203 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:06,180 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:06,180 INFO L85 PathProgramCache]: Analyzing trace with hash -135882077, now seen corresponding path program 37 times [2024-06-03 20:47:06,180 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:06,180 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1287910917] [2024-06-03 20:47:06,180 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:06,180 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:06,186 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:06,499 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:06,499 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:06,500 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1287910917] [2024-06-03 20:47:06,500 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1287910917] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:06,500 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:06,500 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:06,500 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [87186335] [2024-06-03 20:47:06,500 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:06,500 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:06,500 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:06,501 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:06,501 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:06,546 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:06,547 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) [2024-06-03 20:47:06,547 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:06,547 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:06,547 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:08,447 INFO L124 PetriNetUnfolderBase]: 3618/6062 cut-off events. [2024-06-03 20:47:08,447 INFO L125 PetriNetUnfolderBase]: For 941953/941953 co-relation queries the response was YES. [2024-06-03 20:47:08,525 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. [2024-06-03 20:47:08,545 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 351 selfloop transitions, 410 changer transitions 0/767 dead transitions. [2024-06-03 20:47:08,545 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 767 transitions, 14032 flow [2024-06-03 20:47:08,546 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 15 states. [2024-06-03 20:47:08,546 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 15 states. [2024-06-03 20:47:08,546 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 15 states to 15 states and 321 transitions. [2024-06-03 20:47:08,547 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5219512195121951 [2024-06-03 20:47:08,547 INFO L175 Difference]: Start difference. First operand has 544 places, 730 transitions, 11558 flow. Second operand 15 states and 321 transitions. [2024-06-03 20:47:08,547 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 767 transitions, 14032 flow [2024-06-03 20:47:18,097 INFO L88 GeneralOperation]: Finished removeRedundantFlow, result has has 545 places, 767 transitions, 13031 flow, removed 21 selfloop flow, removed 13 redundant places. [2024-06-03 20:47:18,119 INFO L231 Difference]: Finished difference. Result has 546 places, 730 transitions, 11407 flow [2024-06-03 20:47:18,119 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} [2024-06-03 20:47:18,119 INFO L281 CegarLoopForPetriNet]: 42 programPoint places, 504 predicate places. [2024-06-03 20:47:18,119 INFO L495 AbstractCegarLoop]: Abstraction has has 546 places, 730 transitions, 11407 flow [2024-06-03 20:47:18,120 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) [2024-06-03 20:47:18,120 INFO L200 CegarLoopForPetriNet]: Found error trace [2024-06-03 20:47:18,120 INFO L208 CegarLoopForPetriNet]: trace histogram [1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1, 1] [2024-06-03 20:47:18,120 WARN L477 AbstractCegarLoop]: Destroyed unattended storables created during the last iteration: SelfDestructingSolverStorable202 [2024-06-03 20:47:18,120 INFO L420 AbstractCegarLoop]: === Iteration 204 === Targeting ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT === [ULTIMATE.startErr0ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr1ASSERT_VIOLATIONWITNESS_INVARIANT, ULTIMATE.startErr2ASSERT_VIOLATIONWITNESS_INVARIANT (and 3 more)] === [2024-06-03 20:47:18,120 INFO L160 PredicateUnifier]: Initialized classic predicate unifier [2024-06-03 20:47:18,120 INFO L85 PathProgramCache]: Analyzing trace with hash -135876497, now seen corresponding path program 38 times [2024-06-03 20:47:18,120 INFO L118 FreeRefinementEngine]: Executing refinement strategy CAMEL [2024-06-03 20:47:18,120 INFO L334 FreeRefinementEngine]: Using trace check IpTcStrategyModuleSmtInterpolCraig [1160660603] [2024-06-03 20:47:18,121 INFO L95 rtionOrderModulation]: Keeping assertion order NOT_INCREMENTALLY [2024-06-03 20:47:18,121 INFO L127 SolverBuilder]: Constructing new instance of SMTInterpol with explicit timeout -1 ms and remaining time -1 ms [2024-06-03 20:47:18,127 INFO L136 AnnotateAndAsserter]: Conjunction of SSA is unsat [2024-06-03 20:47:18,456 INFO L134 CoverageAnalysis]: Checked inductivity of 0 backedges. 0 proven. 0 refuted. 0 times theorem prover too weak. 0 trivial. 0 not checked. [2024-06-03 20:47:18,457 INFO L136 FreeRefinementEngine]: Strategy CAMEL found an infeasible trace [2024-06-03 20:47:18,457 INFO L334 FreeRefinementEngine]: Using interpolant generator IpTcStrategyModuleSmtInterpolCraig [1160660603] [2024-06-03 20:47:18,457 INFO L158 FreeRefinementEngine]: IpTcStrategyModuleSmtInterpolCraig [1160660603] provided 1 perfect and 0 imperfect interpolant sequences [2024-06-03 20:47:18,457 INFO L185 FreeRefinementEngine]: Found 1 perfect and 0 imperfect interpolant sequences. [2024-06-03 20:47:18,457 INFO L198 FreeRefinementEngine]: Number of different interpolants: perfect sequences [7] imperfect sequences [] total 7 [2024-06-03 20:47:18,457 INFO L121 tionRefinementEngine]: Using interpolant automaton builder IpAbStrategyModuleStraightlineAll [1977969882] [2024-06-03 20:47:18,457 INFO L85 oduleStraightlineAll]: Using 1 perfect interpolants to construct interpolant automaton [2024-06-03 20:47:18,457 INFO L571 AbstractCegarLoop]: INTERPOLANT automaton has 9 states [2024-06-03 20:47:18,457 INFO L100 FreeRefinementEngine]: Using predicate unifier PredicateUnifier provided by strategy CAMEL [2024-06-03 20:47:18,458 INFO L143 InterpolantAutomaton]: Constructing interpolant automaton starting with 9 interpolants. [2024-06-03 20:47:18,458 INFO L145 InterpolantAutomaton]: CoverageRelationStatistics Valid=24, Invalid=48, Unknown=0, NotChecked=0, Total=72 [2024-06-03 20:47:18,515 INFO L471 CegarLoopForPetriNet]: Number of universal loopers: 13 out of 41 [2024-06-03 20:47:18,515 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) [2024-06-03 20:47:18,515 INFO L112 encePairwiseOnDemand]: Universal subtrahend loopers provided by user. [2024-06-03 20:47:18,516 INFO L113 encePairwiseOnDemand]: Number of universal subtrahend loopers: 13 of 41 [2024-06-03 20:47:18,516 INFO L73 FinitePrefix]: Start finitePrefix. Operand will be constructed on-demand [2024-06-03 20:47:20,268 INFO L124 PetriNetUnfolderBase]: 3615/6058 cut-off events. [2024-06-03 20:47:20,268 INFO L125 PetriNetUnfolderBase]: For 917568/917568 co-relation queries the response was YES. [2024-06-03 20:47:20,344 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. [2024-06-03 20:47:20,364 INFO L140 encePairwiseOnDemand]: 30/41 looper letters, 348 selfloop transitions, 410 changer transitions 0/764 dead transitions. [2024-06-03 20:47:20,364 INFO L145 encePairwiseOnDemand]: Finished differencePairwiseOnDemand. Result has 558 places, 764 transitions, 13577 flow [2024-06-03 20:47:20,364 INFO L141 InterpolantAutomaton]: Switched to read-only mode: deterministic interpolant automaton has 13 states. [2024-06-03 20:47:20,365 INFO L82 GeneralOperation]: Start removeUnreachable. Operand 13 states. [2024-06-03 20:47:20,365 INFO L88 GeneralOperation]: Finished removeUnreachable. Reduced from 13 states to 13 states and 284 transitions. [2024-06-03 20:47:20,365 INFO L516 CegarLoopForPetriNet]: DFA transition density 0.5328330206378987 [2024-06-03 20:47:20,365 INFO L175 Difference]: Start difference. First operand has 546 places, 730 transitions, 11407 flow. Second operand 13 states and 284 transitions. [2024-06-03 20:47:20,365 INFO L82 GeneralOperation]: Start removeRedundantFlow. Operand has 558 places, 764 transitions, 13577 flow Killed by 15